PRIVACY & DATA

Privacy and Cookie Policy

Knowledge Compendium respects the privacy of its readers and is committed to handling personal information transparently, fairly, and securely.

This Privacy and Cookie Policy explains what information we collect when you visit Knowledge Compendium, contact us, subscribe to newsletters or email alerts, or otherwise interact with the Website. It also explains why we use that information, who may receive it, how long it may be retained, and the choices and rights available to you.

Last updated: 1 August 2026

Who We Are

The Website is operated by:

Knowledge Compendium, Lda
Tax and VAT number: PT517797445
Rua Dom Jorge de Lencastre 10A, Esc. 10
3800–141 Aveiro
Portugal

Email: info@knowledgecompendium.com

Knowledge Compendium, Lda is the controller of the personal information processed for the purposes described in this policy, except where a third party acts as an independent controller for its own purposes.

In this policy, “Knowledge Compendium”, “we”, “us”, and “our” refer to Knowledge Compendium, Lda. “Website” refers to knowledgecompendium.com and the pages and services made available through it.

Information We Collect

The information we collect depends on how you interact with the Website.

Information you provide

You may provide us with:

  • your email address when subscribing to a newsletter or email alert;
  • the authors, series, subjects, or types of publication about which you choose to receive alerts;
  • your name, email address, and the contents of your message when using the contact form;
  • information included in correspondence with us;
  • information needed to process a privacy or data-protection request.

Please do not include sensitive personal information in a contact message unless it is genuinely necessary for us to address your request.

Newsletter and subscription information

When you subscribe, we may record:

  • your email address;
  • the newsletter, author, series, or alert selected;
  • the date, time, and source of the subscription;
  • confirmation of the subscription;
  • changes to your preferences;
  • unsubscribe, delivery, and bounce information;
  • email opening or link-interaction information, where this functionality is enabled and permitted by applicable law.

Information collected automatically

When you visit or interact with the Website, we and the service providers supporting the Website may automatically receive information such as:

  • your Internet Protocol address;
  • browser and device type;
  • operating system;
  • device and advertising identifiers;
  • language and approximate location;
  • referring and destination pages;
  • pages visited and links selected;
  • searches and interactions performed on the Website;
  • date, time, and duration of visits;
  • diagnostic, performance, security, and server-log information;
  • interactions with advertisements;
  • cookie identifiers and information collected through similar technologies.

Some advertising partners may also process pseudonymous identifiers or an email address in hashed form where this functionality is used, legally permitted, and covered by the relevant privacy choices.

We do not use personal information to make decisions about you that produce legal or similarly significant effects. Advertising partners may, subject to your choices and applicable law, use information to infer interests and select advertisements.

How and Why We Use Information

We use personal information only where we have an appropriate purpose and legal basis.

Operating and protecting the Website

We process technical, diagnostic, and security information to:

  • deliver pages and Website functionality;
  • prevent spam, fraud, misuse, and security incidents;
  • diagnose technical problems;
  • protect our systems, content, readers, and legal rights;
  • maintain backups and business continuity.

This processing is based on our legitimate interests in operating and securing the Website and, where applicable, compliance with legal obligations.

Responding to enquiries

We use the information submitted through the contact form or by email to:

  • read and respond to your message;
  • request any clarification needed;
  • investigate a reported error or problem;
  • provide reasonable follow-up;
  • maintain a record of relevant correspondence.

This processing is based on our legitimate interest in communicating with readers and administering the Website. Where your message concerns a possible contractual relationship, we may also process it to take steps at your request before entering into a contract.

Information submitted through the contact form is not added to a newsletter or used for unrelated marketing unless you provide separate consent.

Sending newsletters and email alerts

With your consent, we use your email address and subscription preferences to send:

  • general Knowledge Compendium newsletters;
  • alerts about a particular author;
  • alerts about a particular book series;
  • other updates that you have specifically selected.

Each subscription is associated with the subject or category selected by the reader. Subscribing to one author, series, or newsletter does not by itself authorise us to send unrelated categories of marketing communication.

We may also send administrative messages needed to confirm, manage, or complete your subscription.

Measuring and improving the Website

Subject to your privacy choices and applicable law, we may use measurement technologies to understand:

  • how readers find the Website;
  • which pages and features are used;
  • general audience and device patterns;
  • whether pages function correctly;
  • how the Website can be made clearer, faster, and more useful.

The reports available to us are generally statistical or aggregated. Measurement providers may nevertheless process device, cookie, network, and interaction information when providing their services.

Where consent is required, non-essential measurement technologies are activated only after consent has been given.

Displaying and measuring advertisements

The Website displays third-party advertisements. Advertising helps fund the research, operation, maintenance, and publication of Knowledge Compendium.

Depending on your location, choices, and applicable law, advertising partners may use cookies and similar technologies to:

  • deliver and display advertisements;
  • select contextual or personalised advertisements;
  • limit how often an advertisement is shown;
  • measure advertisement delivery and performance;
  • prevent invalid traffic and fraud;
  • create or use audience segments;
  • understand interactions with advertisements and websites;
  • link information across devices, browsers, websites, or applications.

The legal basis for a particular advertising activity may be your consent or, where permitted, a legitimate interest relied on by an advertising partner. The purposes, partners, legal bases, and available objections are presented in the consent and privacy controls made available on the Website.

Rejecting non-essential cookies does not necessarily remove advertisements. You may instead receive contextual or non-personalised advertisements that are selected primarily according to the content being viewed rather than an advertising profile.

Complying with law and protecting rights

We may process or disclose information where reasonably necessary to:

  • comply with a legal obligation, court order, or lawful request;
  • establish, exercise, or defend legal claims;
  • enforce our terms and policies;
  • investigate suspected unlawful activity;
  • protect the rights, property, or safety of Knowledge Compendium, our readers, or another person.

Newsletters and Email Alerts

Newsletter subscriptions use a confirmation process. After entering an email address, you may be asked to confirm the subscription through a message sent to that address.

This process helps us verify that the address belongs to the person requesting the subscription and creates a record of the consent provided.

You may manage or end a subscription at any time by:

  • using the unsubscribe or preference-management link included in an email;
  • changing the individual author, series, or newsletter preferences available to you;
  • contacting us at info@knowledgecompendium.com.

Where available, you may unsubscribe from one author or series while remaining subscribed to others. You may also unsubscribe from all promotional communications.

Withdrawing consent does not affect processing that took place lawfully before the withdrawal. We may retain limited suppression information after an unsubscribe request to ensure that the address is not accidentally re-added to the communication that was refused.

Contact Form

The contact form collects the name, email address, and message entered by the sender. Technical and anti-spam information may also be processed to protect the form against automated submissions and abuse.

We use contact-form information only to understand, answer, investigate, or reasonably follow up on the communication received.

We do not use contact-form information to subscribe the sender to newsletters, create advertising profiles, or send unrelated promotional communications without separate consent.

Cookies and Similar Technologies

Cookies are small files or identifiers stored on, or accessed from, a browser or device. The Website may also use pixels, tags, local storage, software development kits, server-side identifiers, and comparable technologies.

These technologies may be placed by Knowledge Compendium or by third parties supporting the Website.

Essential technologies

Essential technologies are needed to:

  • load and operate the Website;
  • remember privacy and consent choices;
  • provide security and prevent abuse;
  • distribute network traffic;
  • maintain basic functionality.

These technologies cannot always be disabled through the Website because the Website may not function correctly without them.

Preference and functionality technologies

These technologies remember choices that improve the reader’s experience, such as display, language, or interface preferences.

Measurement technologies

Measurement technologies help us understand Website usage, performance, errors, and general audience patterns.

Advertising technologies

Advertising technologies help deliver, personalise, limit, and measure advertisements and prevent advertising fraud.

Managing your choices

Where required by law, non-essential technologies are not used until you have been given the opportunity to make a choice.

The privacy interface may allow you to:

  • agree to the available purposes;
  • reject non-essential processing;
  • review individual purposes and partners;
  • object to processing based on legitimate interests where applicable;
  • change or withdraw a previous choice.

You may update your choices at any time through the Manage Privacy Preferences or equivalent link displayed on the Website.

You may also delete or block cookies through your browser settings. Browser-level changes may remove stored preferences, cause the consent interface to appear again, or affect Website functionality.

Withdrawing consent must not affect the lawfulness of processing carried out before the withdrawal.

Advertising

Advertising partners may receive or collect information directly from your browser or device, including:

  • Internet Protocol address;
  • cookie and advertising identifiers;
  • browser, device, and operating-system information;
  • language and approximate location;
  • pages visited and referral information;
  • advertisement views, selections, and interactions;
  • traffic and usage information;
  • pseudonymous or hashed identifiers where applicable.

Advertising partners may combine this information with information obtained independently from other websites, applications, devices, or sources, subject to their own legal obligations and the privacy choices available to you.

The current list of participating advertising partners, their purposes, and their privacy information is available through the Website’s privacy-preference interface or the advertising-partner information linked from it.

We do not sell personal information in exchange for money. Certain disclosures associated with targeted advertising may nevertheless be regarded as a “sale”, “sharing”, or use for targeted advertising under some United States privacy laws.

Residents of jurisdictions that provide these rights may use the Do Not Sell or Share My Personal Information, Your Privacy Choices, or equivalent control displayed on the Website.

Website Measurement

We use third-party measurement services to produce reports about Website traffic and usage.

Depending on the applicable settings and your choices, these services may process information such as:

  • truncated or complete Internet Protocol addresses;
  • device, browser, and operating-system details;
  • approximate geographic region;
  • pages viewed;
  • referral sources;
  • Website events and interactions;
  • dates, times, and session information;
  • cookie or device identifiers.

Where applicable law requires consent, measurement storage and collection remain disabled until the consent platform communicates an appropriate choice.

We use measurement information to evaluate and improve the Website, not to make decisions producing legal or similarly significant effects about individual readers.

Some pages contain links to books, retailers, publishers, authors, social networks, or other third-party websites. Some retailer links are affiliate links.

When you follow an affiliate link and complete a qualifying transaction, Knowledge Compendium may receive a commission without increasing the price you pay.

The link may contain an identifier that allows the retailer or affiliate service to attribute the referral to Knowledge Compendium. After you follow the link, the destination website may collect information from your browser or device and may use its own cookies and tracking technologies.

Third-party websites operate under their own terms and privacy policies. Knowledge Compendium does not control their data-processing practices.

Embedded third-party content, where used, may also allow its provider to receive information about the page, browser, device, or interaction.

Who Receives Information

We may disclose information to the following categories of recipients where necessary:

  • Website hosting, infrastructure, content-delivery, and storage providers;
  • security, backup, spam-prevention, and technical-support providers;
  • newsletter delivery and subscription-management providers;
  • analytics and Website-measurement providers;
  • consent-management and privacy-preference providers;
  • advertising exchanges, advertising networks, advertisers, and measurement partners;
  • affiliate-management and referral services;
  • professional advisers, including legal and accounting advisers;
  • public authorities, courts, regulators, or law-enforcement bodies where disclosure is lawfully required;
  • a purchaser, investor, or successor in connection with a genuine corporate restructuring, merger, financing, or sale, subject to appropriate confidentiality and legal safeguards.

Some providers process personal information solely on our instructions. Others determine their own purposes and operate as independent controllers. Where a provider acts independently, its own privacy notice applies to its processing.

We do not disclose newsletter or contact-form information to unrelated parties for them to send their own marketing merely because you contacted or subscribed to Knowledge Compendium.

International Transfers

Some service providers and advertising partners may process information in countries outside Portugal, the European Economic Area, the United Kingdom, or your country of residence.

Where data-protection law requires safeguards for an international transfer, we rely on an available lawful mechanism, which may include:

  • a formal adequacy decision;
  • approved standard contractual clauses;
  • participation in a recognised data-protection framework;
  • another transfer mechanism permitted by applicable law.

Additional technical, contractual, or organisational measures may be used where appropriate.

Information about a specific advertising partner or its transfer arrangements may be available through the Website’s privacy-preference interface or that partner’s privacy notice.

How Long We Retain Information

We retain personal information only for as long as reasonably necessary for the purpose for which it was collected and for any related legal, security, or compliance requirement.

In particular:

  • newsletter information is retained while the subscription remains active;
  • limited unsubscribe or suppression information may be retained after withdrawal to honour the reader’s choice;
  • subscription and consent records may be retained for as long as reasonably necessary to demonstrate compliance;
  • contact-form correspondence is normally retained only while the request is being handled and for a reasonable follow-up period afterwards;
  • information relevant to a dispute, complaint, or legal claim may be retained until the matter and applicable limitation periods have ended;
  • technical and security logs are retained for a limited period determined by diagnostic, security, and abuse-prevention needs;
  • advertising, cookie, and measurement information is retained according to the periods disclosed in the relevant privacy controls or partner notices.

When information is no longer required, we delete it, anonymise it, or securely isolate it until deletion is possible.

Your Rights and Choices

Depending on your location and the applicable law, you may have the right to:

  • obtain confirmation that we process your personal information;
  • access that information;
  • correct inaccurate or incomplete information;
  • request deletion;
  • request restriction of processing;
  • object to processing based on legitimate interests;
  • object at any time to direct marketing;
  • receive certain information in a structured, commonly used, machine-readable format;
  • request transmission of eligible information to another controller;
  • withdraw consent at any time;
  • complain to a competent data-protection authority;
  • receive information about relevant international-transfer safeguards;
  • not be subject to a decision based solely on automated processing that produces legal or similarly significant effects.

These rights may be subject to legal conditions and exceptions.

Residents of certain United States jurisdictions may also have rights to:

  • know or access categories and specific items of personal information;
  • correct or delete personal information;
  • obtain a portable copy;
  • opt out of sale, sharing, targeted advertising, or certain profiling;
  • appeal a refusal to act on a request;
  • exercise their rights without unlawful discrimination.

You may exercise rights relating to advertising through the privacy controls displayed on the Website. Other requests may be sent to info@knowledgecompendium.com.

We may need to request sufficient information to verify your identity and understand the request. An authorised representative may submit a request where permitted by applicable law, subject to verification of the representative’s authority.

We aim to respond within the period required by applicable law. Exercising a right is generally free, although the law may permit a reasonable fee or refusal where a request is manifestly unfounded, excessive, or repetitive.

Children’s Privacy

The Website is intended for a general audience and is not designed to solicit personal information from children below the age at which they may independently provide valid consent under the law applicable to them.

A child who is not legally able to provide consent should use newsletter and contact features only with the authorisation of a parent or legal guardian.

If you believe that a child has provided personal information without the consent required by law, please contact us so that we can investigate and take appropriate action.

Information Security

We use reasonable technical and organisational measures intended to protect personal information against accidental or unlawful loss, alteration, disclosure, misuse, or unauthorised access.

These measures may include access restrictions, secure communications, software maintenance, backups, monitoring, and contractual safeguards with providers.

No online service or method of storage can be guaranteed to be completely secure. Readers should therefore use reasonable care when submitting information online.

Where a personal-data breach creates a legally defined risk, we will notify the competent authority and affected individuals when required by applicable law.

Changes to This Policy

We may update this policy when:

  • Website features change;
  • new processing activities are introduced;
  • service-provider arrangements change;
  • legal or regulatory requirements develop;
  • we improve the clarity of our disclosures.

The date at the beginning of the policy indicates when it was last updated.

Where a change materially affects processing based on consent, we will request a new choice where required. We will not treat continued browsing as consent where an affirmative choice is legally necessary.

Contact and Complaints

Questions, requests, or concerns about this policy or our handling of personal information may be sent to:

Knowledge Compendium, Lda
Rua Dom Jorge de Lencastre 10A, Esc. 10
3800–141 Aveiro
Portugal

Email: info@knowledgecompendium.com

You also have the right to lodge a complaint with the data-protection authority in your country of residence, place of work, or the location of an alleged infringement.

The supervisory authority in Portugal is:

Comissão Nacional de Proteção de Dados — CNPD
Av. D. Carlos I, 134, 1.º
1200–651 Lisboa
Portugal

Telephone: +351 213 928 400
Email: geral@cnpd.pt