About this tool
A searchable directory of 2,000+ freely and legally available programming, CS and math books, filterable by subject and language. 100% client-side.
Data from the Free Ebook Foundation project, licensed under CC BY 4.0.
Frequently asked questions
Are these books legally free, or is this piracy?
Legally free — every entry links to a book its own author or publisher chose to release for free (self-published, open-licensed, or an official free edition), curated by the long-running "Free Ebook Foundation" community project. This is not a pirated-content list.
Why are there far fewer books in some languages than others?
This directory mirrors the source project's per-language lists exactly, and free/open book publishing has historically been much more active in some language communities (especially English) than others — this reflects the real state of available free content, not a limitation of this tool.