Subject
4 free books about mendel's law, free to read online. Chapter 1 of any book is free, no account needed.
The Organism as a Whole, from a Physicochemical Viewpoint
Jacques Loeb
Mendel's principles of heredity: A defence
Bateson, William; Mendel, Gregor
Mendelism Third Edition
Reginald Crundall Punnett
Hormones and Heredity A Discussion of the Evolution of Adaptations and the Evolution of Species
J. T. Cunningham