Dory, the youngest in her family, is a girl with a very active imagination, and she spends the summer playing with her imaginary friend, pretending to be a dog, battling monsters, and generally driving her family nuts.

"When Dory's best friend learns to read before she does, Dory retreats into her wild imagination and finds herself in the middle of one of the babyish books she is struggling to read where she encounters imaginary friends and enemies"--

"Dory's sure that her big sister's friendship troubles have to do with pirates, but she'll have to navigate those rocky waters without her imaginary first mate Mary, who's found an exciting new pal of her own"--