Start with high-confidence animal rights books, then narrow by subgenre or adjacent topics.
Once Upon a Time We Ate Animals
Roanne van Voorst
Beneath the Surface
John Hargrove, Howard Chua-Eoan
Esther the Wonder Pig
Steve Jenkins, Derek Walter
Slaughterhouse
Gail A. Eisnitz
The New Sentience
Ashley Capps, Allison Titus
