Start with high-confidence mammal biology books, then narrow by subgenre or adjacent topics.
The Rise and Reign of the Mammals
Steve Brusatte
The Hidden World of the Fox
Adele Brand
The Sibley Field Guide to Birds of Western North America
David Allen Sibley
Field Guide to Mammals of Europe, North Africa and the Middle East
Stéphane Aulagnier, Patrick Haffner
Alligators
Kent A. Vliet, Wayne Lynch
Birds of North America
Bruce M. Beehler, Brian E. Small
The Rise of Mammals in Africa
Emmanuel Gheerbrant, Charlène Letenneur
Almost Human
Lee Berger, John Hawks
Wolves, Coyotes & Foxes
Stan Tekiela
Eavesdropping on Animals
George Bumann, Jon Young
Illustrated History of Primatology
Matthew Richardson
