Applegate, Katherine

David, the sixth Animorph, returns to seek revenge on the other Animorphs.

The Animorphs try to decide if they should publicize their struggle against the Yeerks.

Cassie finds herself alone in Australia where she is confronted by Visser Three.

The Yeerks discover that the Andalite bandits are human.

The Animorphs, a group of young people who have been given the power to transform themselves into animals in order to wage war against the evil alien Yeerks, receive unexpected help from the Taxxons, who have their own grudge against the enemy.

The Animorphs are challenged when the Yeerks try to take over the National Guard as the first step in their conquest of humanity.

Summer's winter break is made miserable when her ex-boyfriend and his new girlfriend show up everywhere she goes in the Florida Keys, which only serves to remind her how much she misses him.

Visser Two has arrived on Earth and plans to start World War III. Ax and his friends must find a way to stop the war or to stop Visser Two forever.

The story of the Andalites before the rise of the Yeerks.

David and his friends are transported to a fantastic world where they search for their friend Senna.