I am the Messenger/Zusak

Main characters: Ed, his dog, the Doorman),Marv, Audrey. Setting: Edgar Street, St Michael's Church. Ed Kennedy stops a bank robbery and is threatened by the robber. Soon Ed starts receiving Ace's in his mailbox advising him to help or hurt certain people. The mystery is who is making Ed The Messenger and why? All questions will assume this intro: "In which book . . ."