It appeared in 1961, when its author was a young architect and its illustrator (his friend and housemate) had just begun contributing cartoons to the Village Voice. But The Phantom Tollbooth quickly became one of those books that critics call an instant classic, and readers ever since have named it one of the most influential books of their childhood. Norman Juster and Jules Feiffer take us to a fantastic world of offbeat wit, wisdom, and wordplay, where young Milo learns to love learning. In his extensive annotations, children's literature scholar Leonard Marcus profiles Juster and Feiffer and explores the book's creation and its legacy.