When Mongoose finds a blue library card hidden among the candy he's shoplifted, his friend Weasel tosses the card away. But the card comes back. Brenda, a television addict, must endure the Great TV Turn-Off. No more "Teen Toons." No more "Dude Feud." Then the blue card appears... On a hot summer day, Sonseray wanders into a library knowing he'll find air-conditioning — and finds much more. And April Mendez takes a ride in a bookmobile unlike any other. Mongoose, Brenda, Sonseray, and April have nothing in common...until a mysterious blue card appears as if by magic and begins to change each of their lives. None of them guesses it at first, but that strange blue card will be their ticket to the past — and to a future that they never imagined. In stories that range from humorous to heartbreaking, Newbery award-winner Jerry Spinelli reveals the amazing possibilities lurking behind library doors.