Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
G. B. Sowerby
Charles Darwin
Mary Anne Venning
E. A. Smith, F. J. Bell, R. Kirkpatrick, and British Museum . Department of Zoology
Julia McNair Wright
Society for Promoting Christian Knowledge . Committee of General Literature and Education
Edgar Allan Poe and Thomas Brown
Thomas Wyatt
Peter Gray and B. B. Woodward
Massachusetts. Commissioners on Fisheries and Game and David Lawrence Belding
Various
Alfred Edmund Brehm
Wilhelm Kobelt
These books are free to read. Each is in the public domain in the United States; check your own country's rules before you copy or share one.