What is the setting of It's Kind of a Funny Story by Ned Vizzini?

The novel takes place in various places in New York City. This setting is important because the city symbolizes a number of things for the main character, Craig. His early years were spent in Manhattan, which still stands as a symbol of success for him. Manhattan is connected to Brooklyn, where he currently lives, by a bridge and Craig imagines that when he is an adult, he will cross that bridge, both literally and figuratively, and make his mark on the world.