Yes, It's Hot in Here explores the entertaining history of the mascot from its jester roots in Renaissance society to the slapstick pantomime of the Clown Prince of Baseball, Max Patkin, all the way up to the mascots of the slam-dunk, rock-and-roll, Jumbotron culture of today. Along the way, author AJ Mass of ESPN.com (a former Mr. Met himself) talks to the pioneers among modern-day mascots like Dave Raymond (Phillie Phanatic), Dan Meers (K. C. Wolf), and Glenn Street (Harvey the Hound) and finds out what it is about being a mascot that simply won't leave the performer.

Mass examines what motivates high school and college students to compete for the chance to wear a sweaty animal suit and possibly face the ridicule of their peers in the process, as well as women who have proudly served as mascots for teams in both the pro and amateur ranks. In the book's final chapter, Mass climbs inside a mascot costume one more time to describe what it feels like and, perhaps, rediscover a bit of magic.