A Natural History of the Fantastic is a book that takes a bunch of the world's most popular monsters and mythical creatures -- from trolls to imps to angels to mermaids -- and shows us what they look like on the inside. It's all very scientific, of course.
The book provides "detailed anatomy, artifacts, and biological histories" for each of twenty creatures, taking a very serious approach to the question "centaurs, how do they work?".
The book's up on Kickstarter.