The Simpsons and Their Mathematical Secrets by Simon Singh (2013)

Also speaking of Simon Singh: It turns out that The Simpsons had a surprising number of legit mathematicians on their early writing staff, and the show is stocked with math references and inside jokes. Singh’s an entertaining writer and has a knack for making complex concepts approachable, so if you’re a Simpsons fan (and who isn’t?) and at all interested in math, this is for you.