Biodiversity Heritage Library is a consortium of natural history and botanical libraries, which provides an open access e-book resources through a digitization.

Millions of books can be accessed and read for free from Google books.

Accessible for the public under the creative commons license. Varieties of ebooks such as botany, cosmoloy and zoology are made available .

Free books online from the University of Adelaide.

Hundreds of academic titles are provided for the public access.

Links to other free e-books sites.

The Million Book Project is a collaborative internet library launched by the institutions of world-wide. Books are digitized and then indexed using optical character recognition (OCR).

Contains an index of online books, directories and archives of online texts. Special collections such as a Celebration of Women Writers, Banned Books and Prize Winning Books Online are highlighted for the public.

More than 38,000 e-books are collected by the Project Gutenberg. Most of them are old literature, which are out of copyright in the United state. Can be downloaded or read online.

The collections consist of reports from the RAND corporation covering issues of US national security, education, health, law, and science.

Access to free e-books.

A selection of free chapters are contained in the Princeton University Press publication.