In the book Al Capone Does My Shirts, Mooses father states that prison guards do not get paid very well. In chapter 13 it states that Mooses family needs the money because his dad does not get paid very well.
In chapter 3 it states that Piper is Warden Williams daughter, and they live on Alcatraz island.
In chapter 14 it states that the convicts play baseball on Alcatraz. This includes Capone.
In the book, it states that guards on Alcatraz did not get paid well. The authors note supports that and states that guards did not get paid very well.
In the book, it says that the warden lived on Alcatraz. That is actually true. The warden did live on Alcatraz.
In the book, it states that the convicts played baseball on Alcatraz. The convicts talked about baseball, but they actually played softball.