Gennifer Choldenko’s enchanting novel, Al Capone Does My Shirts, succeeds due to its believable and endearing protagonist, Matthew “Moose” Flanagan. Moose’s father has just acquired a new job as a guard on Alcatraz, and his family moves to the island, meaning Moose is now neighbors with Al Capone, a rather unsettling thought for the twelve-year-old narrator. The family is dedicated to ensuring Moose’s sister, Natalie, can be admitted to Ester P. Marinoff, a school for children with development disabilities. After moving in, Moose meets Piper, the head warden’s daughter, who is intent on causing mischief and havoc on the island. Moose must navigate the tricky settlement of a new school, and avoid the rampant trouble that is Piper, all while ensuring Natalie remains safe. Choldenko does an admirable job in recreating a 1930’s atmosphere, fraught with child spooks, but the true heart of Al Capone Does My Shirts is her deft dealing of Moose and Natalie’s close and tender relationship, reminding us that there are many complex layers to a sibling relationship that can often belie our comprehension.