Watch the Video Book Trailer This nonfiction book has been faithfully adapted for young readers from the #1 New York Times bestselling memoir Marley & Me by John Grogan! Marley, a lovable Labrador retriever, is always getting himself into trouble. Some may say he is the world's worst dog. But those who know and love Marley understand that nothing can stop his loyalty, exuberance, and passion— not even the Grogans' screen door! How this big, rambunctious dog becomes the heart of the Grogan family is the story of Marley.