Fifth-graders Parker and Lucas get more than they bargained for when they seek to debunk one of Wolver Hollow's greatest legends about a haunted mustache that, every year on the anniversary of its owner's death, seeks a lip to claim as its own.

As they look forward to the New York City Marathon in which their friend Mr. B. will run, the Vanderbeeker children learn that one of their good friends is homeless.

"It's Nimra Sharif's first time going to public school. Nimra's nervous, but as long as she has her best friend, Jenna, by her side, she figures she can take on just about anything. Unfortunately, middle school is hard. The teachers are mean, the schedule is confusing, and Jenna starts giving hijab-wearing Nimra the cold shoulder around the other kids. Desperate to fit in and save her friendship with Jenna, Nimra accepts an unlikely invitation to...