Grade 6-8--In this appealing novel set in 1935, 12-year-old Moose Flanagan and his family move from Santa Monica to Alcatraz Island where his father gets a job as an electrician at the prison and his mother hopes to send his autistic older sister to a special school in San Francisco. When Natalie is rejected by the school, Moose is unable to play baseball because he must take care of her, and her unorthodox behavior sometimes lands him in hot water. He also comes to grief when he reluctantly goes along with a moneymaking scheme dreamed up by the warden's pretty but troublesome daughter. Family dilemmas are at the center of the story, but history and setting--including plenty of references to the prison's most infamous inmate, mob boss Al Capone--play an important part, too. The Flanagan family is believable in the way each member deals with Natalie and her difficulties, and Moose makes a sympathetic main character. The story, told with humor and skill, will fascinate readers with an interest in what it was like for the children of prison guards and other workers to actually grow up on Alcatraz Island.