Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
Jean-Henri Fabre
Sir E. Ray Lankester
Jr. Heber W. Youngken and Joseph S. Karas
Harold Cecil Long
William Anderson Syme
Winifred Elsie Brenchley
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.