keyword: Science – 60 free books.
All these books are free to read: either they're distributed with a free license, or they're in the public domain.
These Public Domain, US ebooks are free to read - they belong to all of us!
Use of this material is not restricted by copyright in the US.
These books do not seem to be included in the Directory of Open Access Books.
D.R. Reidmiller et al. (editors)
Henrietta A Huxley (editor) and Thomas Henry Huxley (Author)
Stephen H. (Stephen Haskins) Carpenter