The indispensable Calvin and Hobbes
This is a book about the lives of boys and tigers in modern day trees. The book presents an interesting hypothesis: tigers can do basic arithmetics, but they have no comprehension of trigonometry or integral calculus.
The book presents a convincing case but I would have liked to see a double-blind study involving a lot more tigers, and perhaps also a reference group of velociraptors.
This book was so good, that I left my fields fallow just to read it.