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OpenStax
Peer reviewed textbooks with free PDF downloads across sciences, maths, economics and more.
Browse General & ReferenceOpen Textbook Library
Hundreds of openly licensed textbooks, complete and free to download.
Browse STEMLibreTexts
The largest open education library: chemistry, biology, engineering, history and beyond.
Browse General & ReferenceDirectory of Open Access Books
Academic books from university presses, all free and peer reviewed.
Browse HumanitiesProject Gutenberg
More than 70,000 classic texts, free in epub and plain text.
Browse General & ReferenceOpen Library
Borrow millions of digitised books from the Internet Archive.
Browse Medicine & HealthPubMed Central
Free full text archive of biomedical and life sciences journal articles.
Browse ComputingarXiv
Open access preprints in physics, maths, computer science and more.
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