What If? 10th Anniversary Edition by Randall Munroe

A special 10th anniversary edition of the million-copy bestseller What If? from the creator of the wildly popular webcomic xkcd—revised and annotated with brand-new illustrations and answers to important questions you never thought to ask.

Fans of xkcd ask Munroe a lot of strange questions: What if you tried to hit a baseball pitched at 90 percent the speed of light? How fast can you hit a speed bump while driving and live? If there was a robot apocalypse, how long would humanity last? What if everyone only had one soulmate? What would happen if the moon went away?