Start with high-confidence animal minds books, then narrow by subgenre or adjacent topics.
The Other End of the Leash
Patricia McConnell, Ph.D.
Dog Is Love
Clive D. L. Wynne
Zak George's Guide to a Well-behaved Dog
Zak George, Dina Roth Port
The Power of Positive Dog Training
Pat Miller
Chaser
John W. Pilley, Hilary Hinzmann
Decoding Your Dog
Amer. Coll. of Veterinary Behaviorists, Debra F. Horwitz
Puppy Kindergarten
Brian Hare, Vanessa Woods
Animal Behavior
DK, D.K. Publishing
Puppy Brain
Kerry Nichols
Inside of a Dog
Alexandra Horowitz
Our Dogs, Ourselves