Animorphs fans will want to collect this bestselling series in four-volume sets with a full-color slipcase cover. This set includes Animorphs #17: Underground, #18: Decision, #19: Departure, and #20: Discovery.

Everyone thought Visser Three and Ax were the only Andalites on Earth...until now. The Animorphs have discovered two other warriors who have escaped from Ax's Dome ship, and they may be able to help fight the Yeerks! But are they really Andalites, or is this just a cunning trap?

Jake, an average suburban kid, is confronted one night by a creature from space who teaches him how to morph into the forms of other creatures. This fantastic, unpredictable, edge-of-your-seat series can best be described as an "X-Files" for kids--plus a whole lot more! Jake, Rachel, Cassie, Tobias, and Marco are the Animorphs--five kids who can change into any animal they touch. The bottom of each page is animated with "flip-book" images, so as kids flip pages, drawings of each character "morph" into animals.

Animorphs RM is an exciting series for young adult readers about five teens who are given the power to morph into any animal they touch and then to absorb its DNA. This power is granted them by a dying Andalite alien named Elfangor, who also warns the teens that Earth is being threatened secretly by a group of aliens called Yeerks. This high-interest series is currently a successful television show and will be sure to intrigue even the most reluctant readers.