The thing that stumps me is why. I never even met Al Capone… why would he help me?
-- Moose (Chapter 1)

Importance: Here, Moose relates to readers how his sister was able to gain admission to a school for the mentally disabled. It occurred after Moose wrote a letter to Al Capone asking for help. Moose has never met Al Capone, and does not know why Al Capone would be willing to help him. Men like Al Capone do not do things without expecting something in return.

Your turn.
-- Al Capone (Chapter 2)

Importance: When Annie accidentally receives Moose’s laundry, she discovers a note in a shirt pocket. The note is from Al Capone and says “Your turn.” Moose is stunned. It means Al Capone wants something back for the favor granted with the Marinoff school. This does not seem to be good for Moose, and worries him so.

I can’t wreck everything for Natalie. She’s...
-- Moose (Chapter 3)