What If?: Serious Scientific Answers to Absurd Hypothetical Questions by Randall Munroe
From the creator of the wildly popular webcomic xkcd, What If? offers hilarious and informative answers to quirky questions you never thought to ask.
Munroe's responses are masterpieces of clarity and wit. They gleefully and accurately explain everything from the relativistic effects of a baseball pitched at near the speed of light to the many horrible ways you could die while building a periodic table of actual elements.
Hardcover, 303 pages.