Open and Free Security Books

Open and Free Security Books#

This section provides a curated, opinionated list of high-quality cyber security books. Where possible, titles are available as PDFs and/or in an easy-to-read online format that works in any browser, without special software or required registration.

All listed books comply with the Open Definition. This means each book is:

Free to access – no paywalls or registration required
Free to use – for personal, educational, or professional purposes
Free to modify and share – under the terms of their respective open licences

If you know of a great cyber security book that deserves a place in this list, please raise an issue. Contributions and suggestions are always welcome!