I Am the Messenger book by Markus Zusak

From the author of The Book Thief comes this darkly funny and ultimately uplifting thriller which proves that anyone can be extraordinary. Ed Kennedy is just your less-than-average Joe who is hopelessly in love with his best friend, Audrey. But after he single-handedly manages to catch a bank robber, he receives a playing card in the mail: the Ace of Diamonds. This is the first message. Four more will follow. But before this particular card game can end, Ed will be changed forever . . . Will Audrey love the man he has become?