Katherine Applegate

The Yeerks have discovered and repaired a damaged Helmacron ship. They know of its morph-seeking capabilities, and they plan to use the ship to capture the "Andalite bandits." And to find Elfangor's blue cube. The one that gave the kids the ability to morph. Cassie and the other Animorphs are in a pretty bad situation. They can't leave the cube in one place, they can't morph without being discovered, and they have to keep moving. It looks like this...

Sometimes your worst problems are the ones you can't actually see. Like the Helmacrons. These less-than-an-inch-high aliens are back, and they want the morphing cube more than ever. Obviously Rachel and the other Animorphs can't let them take the cube. But when Rachel tries to stop the Helmacrons from stealing it, Marco gets in the way and ends up with tiny aliens, well, up his nose. Rachel and the others can't let the Helmacrons stay inside Marco's...

We found out who Visser Four is. And he has found the Time Matrix, the machine Elfangor had hidden in the abandoned construction site. The same place we met him on a night none of us will ever forget. Especially me. Now Visser Four has the Matrix, and he plans to use it to become Visser One. But Jake, Rachel, Cassie, Marco, Ax and I can't let that happen. We can't let him alter time so that the Yeerks will win the invasion. So we're prepared to make...

We could blame everything that happened on Marco. He was the one who heard about the downed submarine. He was the one who thought we should check it out. And everyone knows that if Marco's up to a challenge, I'm definitely there. Everything was going fine. Until the explosion. An explosion that blew us millions of years back in time, to the age of dinosaurs. Now Tobias, Cassie, Marco, Ax, Jake and I are fighting for our lives with every step we...

Tells the true story of Ivan, known as the Shopping Mall Gorilla, who lived alone in a small cage for almost thirty years before he was finally relocated to the gorilla habitat at ZooAtlanta.

"When Cat announces that the Humans have given her a surprise present, Doggo and Pupper are all ears. But when they find out that Cat has a new bed and misses her old one, they set out to help her search for cozy"--

The true story of Ivan, known as the Shopping Mall Gorilla, who lived alone in a small cage for almost 30 years before being relocated to the gorilla habitat at ZooAtlanta.

When Jake, Rachel, Tobias, Cassie, and Marco stumble upon a downed alien spaceship and its dying pilot, they're given an incredible power ... a power they must use to outsmart an evil greater than anything the world has ever seen.

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