The naked ape is a classic. It’s about humans, but it’s written by a zoologist, who treats us as just another type of ape.
The premise is this: If you took the skin of one of each species of primate and examined them closely, there’s one that would stick out – the human. We’re not covered in hair, hence the naked ape. He then goes on to describe the myriad ways in which we resemble apes, physically, psycologically, socially, sexually, etc. It’s brilliant stuff.
It reminds me of a question asked in Douglas Coupland’s Generation X: What animal would you be, if you were an animal? Answer: You already are an animal.