The Principal's Underwear Is Missing — Holly Kowitt

When a shopping bag goes missing from the principal's office, a sixth-grade "nobody" is recruited by Selfie, the most popular girl in the eighth grade, to help solve the mystery in this contemporary middle grade novel.

When you're a sixth-grade nobody, the last person you want to accidentally zonk with a volleyball is Sloan "Selfie" St. Clair--the eighth-grade glamour queen of the school. But that's what happens to Becca Birnbaum, and it only gets worse when she tries to do Selfie a favor. She grabs the wrong shopping bag from the principal's office--one containing a very personal item. And even that might not be so bad, if only Selfie didn't immediately lose it.

If they don't get it back ASAP, they're toast. They try not to panic--until they hear that the Biggest Prank Ever is about to happen. Can the school's oddest couple stop the disaster of a lifetime?

Full of laughs and hijinks, "The Principal's Underwear is Missing" is a delightful, illustrated read about middle school cliques, unexpected friendships, and one hilarious misadventure after the next.