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THE LIBRARY

the memory of the world
Knowledge here is free. It will never cost anything. Sources and credits are shown where they belong, and the shelves can keep growing.

FREE SHELVES

Real institutions giving knowledge away, legally and forever. These links leave the Observatory.
Project Gutenberg75,000+ free books whose copyrights have expired — the classics, free forever. WikipediaThe free encyclopedia anyone can read and improve. Open LibraryA page for every book ever published; borrow many for free. Khan AcademyFree courses, math through history, for any age. LibriVoxFree public-domain audiobooks read by volunteers. Standard EbooksBeautifully formatted free editions of public-domain books. WikisourceFree source texts — speeches, documents, historical works. OpenStaxFree, peer-reviewed college textbooks from Rice University.

WRITTEN HERE

Books written by people of this world. Published here, kept here — the community's own shelf.
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WRITE A BOOK

What you publish joins the memory of the world.
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