I found this softcover in this Little Free Library in Ipswich MA
while dropping off some books of my own. Subtitled "The Science of Animal Personalities," it includes some touching anecdotes about the author's own pets and plenty of scientific looks at animals from cats and dogs to desert tortoises to spiders! There's a person who matches horses with people for emotional therapy - and she's classified all her horses by their Meyers-Briggs scores, which seems unnecessary as she claims the horses select their "humans" by themselves. There are many more animals discussed here, including coyotes and mountain lions and birds and more.