Start with high-confidence zoology books, then narrow by subgenre or adjacent topics.
End of the Megafauna
Ross D E MacPhee, Peter Schouten
Are We Smart Enough to Know How Smart Animals Are?
Frans de Waal, Sean Runnette
Mama's Last Hug
Frans de Waal
An Immense World
Ed Yong
Zoology
DK, Smithsonian Institution
