I really liked this book! It's about a boy, Matthew aka Moose, who comes to live on Alcatrez Island in the 1930's because his dad got a job as a prison guard. He has an older sister, Natalie, who has autism and Moose's mother tries really hard to help Natalie function and be independent. Al Capone is in the prison at this time and Moose's friend, Piper, tries to think of ways to utilize this information without getting in trouble with her father who is the warden. Besides liking the historical aspect of the story, I enjoyed seeing this family come to love and appreciate each other. I also like how unlikely friendships start. I enjoyed this book!