Al Capone does my shirts Book

With a name like Al Capone Does My Shirts, I was settled in for a good light read, not. Not that it isn't an easy read but there is pathos in this story of Moose Flannagan. Moose is the brother of a severely challenged sister, Natalie, who cannot function in society and is sometimes entombed in her own frightening world to the exclusion of even her family.
Moose's father is a prison guard/electrician on the island of Alcatraz. His mother takes a boat to San Francisco most days to teach piano and Moose is in charge of head strong, not to be sidetracked Natalie. How many ways can you spell trouble??? I identified in ways most readers wouldn't with this story because I am the mother of a disabled young adult. I never went through what Natalie's mother went through, looking for a cure, but I think I know that a disability effects everyone in the family. I spent weeks when Jami was little going to the doctor up to three times in a week. There is no way all that time and attention on one child does not take away from the others but you do what you have to do. I like to think that our experience has made our other six children more compassionate people. And a special note to Jeff, my knight in shining armor who spent most of his weekends his junior year babysitting so Mom could get out and socialize - you are my Moose, thank you for all your goodness, love, Mom