The Best Websites for Free College Textbooks: A Comprehensive Guide

The best websites for free college textbooks are OpenStax and LibreTexts for peer-reviewed, openly licensed course texts, the Open Textbook Library for finding open books across publishers, and Open Library and the Internet Archive for borrowing in-copyright titles at no cost. Project Gutenberg covers public-domain classics, and MIT OpenCourseWare fills in lecture notes and problem sets when no open textbook exists. Every site below was checked in August 2026 and is live and free to use.

The best free textbook websites, ranked

1. OpenStax — best for standard intro courses (biology, chemistry, physics, calculus, psychology, economics). Peer-reviewed, openly licensed, free PDF and web versions.
2. LibreTexts — best for STEM depth and customizable texts. Subject libraries in biology, chemistry, math, physics, engineering, statistics, social sciences, humanities, and more.
3. Open Textbook Library — best for discovering open textbooks from many publishers, with faculty reviews.
4. Open Library — best for borrowing in-copyright textbooks free through Controlled Digital Lending.
5. Internet Archive — best for older editions, out-of-print books, and scanned course materials.
6. Project Gutenberg — best for public-domain literature, history, and philosophy reading lists.
7. MIT OpenCourseWare — best for lecture notes, problem sets, and exams that stand in for a textbook.
8. Milne Open Textbooks — best for SUNY-authored, peer-reviewed open textbooks.
9. MERLOT — best for searching a broad catalog of open learning materials beyond books.
10. Saylor — best for full free self-paced courses built around open readings.

One change from earlier versions of this guide: Bookboon no longer belongs on a free list. It now operates on a trial-then-subscription model for individuals and sells corporate learning libraries, so we have removed it.

Site-by-site details

OpenStax

OpenStax, based at Rice University, publishes complete college textbooks that are peer-reviewed and licensed for free use. Its catalog is strongest for high-enrollment introductory courses: the sciences, math through calculus, business, economics, psychology, sociology, and US history. Books are available to read online, download as PDF, or order as low-cost print copies. If your syllabus lists a commercial intro textbook, there is a good chance OpenStax has a direct equivalent with the same chapter order.

LibreTexts

LibreTexts is a faculty-driven platform organized into subject libraries. Unlike a fixed PDF, its books are modular web pages that instructors remix, so you will often find several versions of the same course text. It is especially deep in chemistry, biology, mathematics, physics, and statistics, and it pairs many texts with homework sets through its ADAPT system. Content can be read online or exported as PDF.

Open Textbook Library

Run by the Open Education Network at the University of Minnesota, the Open Textbook Library is a catalog rather than a publisher. It indexes open textbooks from OpenStax, university presses, and independent authors, and each entry is licensed so you can download, edit, and distribute it at no cost. The most useful feature is faculty reviews, which tell you whether a book actually works for a course before you commit to it.

Open Library and the Internet Archive

Open Library is the book-lending front end of the Internet Archive. It lends scanned, in-copyright books free through Controlled Digital Lending: you create a free account, borrow a title for a set period, and read it in the browser. Availability is one reader per copy, so popular textbooks can have a wait, but older editions of major textbooks are frequently available and usually differ from the current edition only in exercise numbering and examples.

The Internet Archive's texts collection also holds fully downloadable public-domain books and scanned university course materials. It is the first place to look for an out-of-print textbook your professor still assigns.

Project Gutenberg

Project Gutenberg hosts tens of thousands of public-domain ebooks (its homepage reports the current total, which was over 79,000 at the time of this update) in EPUB, Kindle, HTML, and plain-text formats. It will not have a modern organic chemistry text, but for literature surveys, philosophy, classics, and history primary sources it often covers the entire reading list.

MIT OpenCourseWare

MIT OCW is not a textbook library, but it publishes free lecture notes, problem sets, and exams from more than 2,500 MIT courses with no registration. When no open textbook exists for a course, a complete set of OCW lecture notes is often the next best thing, and the problem sets come with solutions you can check yourself against.

Milne Open Textbooks, MERLOT, and Saylor

Milne Open Textbooks, from SUNY Geneseo, is a smaller catalog of peer-reviewed open textbooks authored by SUNY faculty, all under Creative Commons licenses. MERLOT is a long-running searchable index of open learning materials, including textbooks, simulations, and lesson modules, with peer-review ratings attached. Saylor offers complete free self-paced courses that bundle open readings with quizzes, which is a good fit when you want structure rather than a standalone book.

Quick comparison

Site	Best for	Format	Account needed?
OpenStax	Intro courses	Web, PDF	No
LibreTexts	STEM depth, remixable texts	Web, PDF	No
Open Textbook Library	Finding open books with reviews	Links to PDF/web	No
Open Library	Borrowing in-copyright titles	In-browser lending	Yes (free)
Internet Archive	Older editions, out-of-print	Download or lend	For lending
Project Gutenberg	Public-domain reading lists	EPUB, Kindle, HTML, text	No
MIT OpenCourseWare	Lecture notes and problem sets	Web, PDF	No
Milne Open Textbooks	SUNY peer-reviewed texts	PDF, web	No
MERLOT	Broad OER search	Links	No
Saylor	Free structured courses	Web	Yes (free)

How to find the specific book you need

1. Search the Open Textbook Library first. Because it indexes multiple publishers, one search covers OpenStax, university-press titles, and independent authors.
2. Check Open Library for the assigned edition. Search by ISBN or title; if the current edition is checked out, an edition one or two back will usually be available and nearly identical.
3. Ask your professor whether an open alternative is acceptable. Many instructors will accept an OpenStax or LibreTexts equivalent if you map chapters to the syllabus yourself.
4. Use your campus library's reserve desk. Most libraries keep assigned textbooks on short-term reserve, and many have affordable-textbook programs that point to the same open sources listed here.
5. Verify the license before sharing. Open textbooks are licensed for redistribution; books borrowed from Open Library are not. Respect the difference.

Pros and cons of free textbooks

Pros: zero cost, instant access from any device, permanent copies of openly licensed books, and the ability to annotate a PDF freely. Open textbooks are also updated without forcing a new paid edition.

Cons: coverage is uneven outside introductory courses, some niche or advanced topics have no open equivalent, and Controlled Digital Lending titles can have waitlists and cannot be downloaded. Quality varies more than with commercial publishers, which is why faculty reviews on the Open Textbook Library and MERLOT matter.

Turning a free textbook into study material

Downloading the book is the easy part. Because nearly every site above gives you a PDF or web text, you can hand that file to an AI study tool and skip the blank-page stage.

• Upload a chapter to the PDF to flashcards tool to get a deck of term and concept cards pulled directly from the text.
• Run a dense chapter through the textbook to video converter when you want a narrated walkthrough before a lecture.
• Use the study notes generator to produce a structured outline you can annotate, and the PDF summarizer to triage which sections deserve a full read.

Scholarly keeps the generated flashcards, quizzes, notes, and videos grounded in the source you uploaded, so the output follows the open textbook's terminology rather than a generic version of the topic.

Frequently asked questions

Are these sites legal?

Yes. OpenStax, LibreTexts, the Open Textbook Library, Milne, MERLOT, and Saylor distribute openly licensed material. Project Gutenberg and the Internet Archive's downloadable texts are public domain. Open Library lends in-copyright books under Controlled Digital Lending, which limits each scanned copy to one reader at a time.

Can I get the exact commercial textbook my class assigned for free?

Usually not the current edition as a download. Your best legal options are borrowing it through Open Library, checking your campus library's reserves, or using an open equivalent that covers the same topics.

Conclusion

Free college textbooks are no longer a workaround; for most introductory courses, OpenStax or LibreTexts has a peer-reviewed book that matches the syllabus, and Open Library fills the gap for in-copyright titles. Start with the Open Textbook Library to search across publishers, borrow what is not open, and then turn the PDF into flashcards, notes, or a video so the free book actually gets studied.