681 books
Open access · Computer science
A free library for people who build software.
1,230 legally free computer science books, textbooks and lecture notes — rescued, verified and organized in one place.
1,230
free books
955
authors
175
publishers
64
license types
Every title is legally free. No account required.
Browse the stacks
Find a topic. Start reading.
346 books
Mathematics
62 books
Miscellaneous
78 books
Operating Systems and Platforms
254 books
Programming and Scripting
111 books
Supporting Fields
New on the shelf
Recently added books
Curated paths
Not sure where to start?
14 books
Open textbooks
Free textbooks from open-education projects, universities and independent authors who publish complete courses online.
Open collection
14 books
Data science
Free books on data analysis, statistics, machine learning and the programming skills needed to turn raw data into decisions.
Open collection
16 books
Classic computer science texts
A reading list of foundational free computer science books: the texts that shaped how generations of programmers think.
Open collectionMost read
The books people keep coming back to.
A mix of classics, course texts and practical handbooks that have been read thousands of times on the original FreeTechBooks.
See the most-read list-
01
Introduction to Objective Caml
Jason Hickey · 432,305 views
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02
Notes for the Course of Algorithms
David Mount · 247,575 views
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03
Lessons In Electric Circuits
Tony R. Kuphaldt · 233,831 views
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04
Data Structures and Algorithms with Object-Oriented Design Patterns in C++
Bruno R. Preiss · 162,502 views
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05
Introduction to Object-Oriented Programming Using C++
Peter Müller · 162,432 views
The rescue
The catalog went offline. The books did not.
FreeTechBooks.com listed free computer science books for more than two decades. When the domain went down, we recovered its bibliographic records, descriptions and links from public web archives — and rebuilt the directory with a cleaner structure, better search and the same simple promise: every book is legally free.
Read the full story
1,230
records recovered
from public web archives
Good to know
Questions about the library
FreeTechBooks is a directory, not a file host. Here is how it works.
Read the FAQAre the books really free?
Yes. Every title is legally available as an open-access textbook, a Creative Commons work, a public-domain book or a free online edition published by its author or publisher. The license is recorded on each book page.
Do I need an account?
No. We do not host books or require registration. The read button takes you to the original source that hosts the book.
What happened to freetechbooks.com?
The original site went offline in 2026. We recovered its catalog from public web archives and rebuilt it here, preserving the book records while updating the structure and search.
How are the books organized?
You can browse by category, author, publisher, license and document type. Curated collections group books by goal, such as learning Python, algorithms, AI or Linux.
Can I suggest a book?
Yes. Send us an open-access book or report a broken link through the contact page. We verify every suggestion before adding it.
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