As Andalite is dying, he gives Jake, Cassie, Marco, Tobias, and Rachel the power to "morph"--to transform into some of the most dangerous creatures on Earth, in an attempt to save humanity from a silent attack.

Marco has never wanted to be an Animorph but the Yeerks are about to do something that will change his mind.

The wildly popular books by K.A. Applegate are back! The Animorphs return in this update of the classic series. Rachel isn't the kind of girl who backs away from a fight. When her dad asks her to move across the country with him, it hurts, but Rachel won't desert her friends in their fight to save the world.But then the Animorphs are contacted by a very old, very powerful alien being that knows about their struggle. He's called the Ellimist, and...

Tobias has gotten used to his new life. He's a red-tailed hawk with the mind of a kid. It was difficult when he first became trapped in his morph, but he's started to come to terms with things. After all, how many kids actually get the chance to fly?But now Tobias is about to make a very difficult choice: a choice that the other Animorphs know nothing about. And it could mean the difference between living the rest of his life as a hawk...and being...

Cassie's had it. After the last mission, she realizes she's getting tired of missions. Tired of battles. Tired of being an Animorph. She decides that she just can't do it anymore. So she quits.But the war for her planet isn't so easy to quit. It seems a human-Controller named Karen followed Cassie after the last run-in with the Yeerks, and she knows Cassie has the ability to morph. If she exposes Cassie, it's all over. No more Cassie. No more Animorphs....

When Tobias has to attend the reading of his father's will, a person claiming to be his long-lost cousin appears but acts suspicious.

The Animorphs and Ax have one true ally in their battle against the Yeerks: the Chee. So, when they discover that the Chee - including their friend, Erek - are in trouble, they have no choice but to help. But the Chee's problem is much deeper than anything the kids could have imagined. It's hidden in the ocean. So far down that no human has ever traveled there - and survived. And the Animorphs realize what will happen if Visser Three discovers...

Jake's grandfather has died. It blows the family away, especially Jake's mom. His parents decide they should all travel to his grandfather's home to help with the arrangements. In another state. For three or four days. This is a very big problem for Jake's brother, Tom. He can't be away from the Yeerk pool for that long. So Tom refuses to go -- but his father insists. Tom's Yeerk will do anything to survive. Including making his father less of a...

Tobias and the other Animorphs already have a few problems: saving the world, keeping their identities secret, finishing their homework. Now they have one more thing to add to the list. The Yeerks have discovered a way to cause a person to demorph. And with this new device Visser Three plans on capturing "the Andalite bandits." Now what? The Animorphs realize they have to get rid of the device -- or be captured by the Yeerks. And the risk of getting...

When Jake has to leave town for a family thing, the other Animorphs and Ax figure life will pretty much be normal until he gets back. But when Tobias discovers Visser Three's newest feeding place, the kids decide they have to check it out. But there's no assigned leader. Who will be the best one for the job? Being in chare isn't just guts and glory. It's about making decisions that will mean the difference between life...and death.

Ax and the Animorphs flee the Yeerks, who seek to find the blue cube that gives the kids the ability to morph.

Jake is just a normal kid. Well, as normal as possible considering he can morph animals, and he's in a war against parasitic aliens. But as unbelievable as it sounds, something even stranger has happened. One morning Jake wakes up, and he's twenty-five years old. Okay. Maybe it's a nightmare. Or maybe Jake's just lost it for a while and misplaced a few years. And there's another problem. The world Jake-the-kid went to sleep in has changed. It's ruled...

Marco is determined to save his father from the Yeerks.

The Animorphs have to make the most important decision they've ever faced: Do they continue to fight the Yeerks in secret, or is it time to let everyone know there's a resistance? That the Animorphs exist and Earth does stand a small chance against the invasion. Jake knows that either choice is a major one, not something that a kid should be responsible for. But he's getting tired of the pressure. Even though he realizes his friends need him to...

The Yeerks are finally starting to realize that the "Andalite bandits" are probably not aliens at all. That maybe they've been dealing with humans all along. And no one - especially the newly appointed Visser One - is happy about this revelation. When Tobias and the other Animorphs realize that the Yeerks are about to find them, it's by accident. But that doesn't make the discovery any less serious. Because in a war, one side wins and one side loses......