The Physics of the Buffyverse, by Jennifer Ouellette is an in-depth look at the science behind the hit shows Buffy the Vampire Slayer and Angel. Ouellette pulls from a wide variety of examples of extraordinary monsters and happenings from the Buffyverse and explains how they might be possible in the real world, and how they'd work. She often compares vampires and other demons' abilities to the nature of common animals and insects in Ouellette's section on biology.
I was afraid that this might be a bit over my head, since my favorite subject wasn't physics. But Ouellette does a wonderful job of explaining the science in layman's terms, complete with the occasional illustration to drive her points. I found a lot of the facts behind "what is possible and why" pretty interesting. From how someone the size of Buffy could toss a larger man to theories on time manipulation, Ouellette covers a large range of topics and conjectures.
If you're a big fan of Buffy and Angel, and would like learning more about how things work in the Buffyverse, this book is for you.