Books about Animorphs from Amazon.com

Jake, Rachel, Cassie, Tobias, and Marco share a second adventure in which their unusual abilities to transform into animals help them to solve a strange otherworldly mystery .
Price: $6.95 [Notify me when price goes down.]

Unable to ignore the strange dreams that she and her friends have experienced since they developed morphing powers, Cassie wonders if a dream that draws her to the sea is a cry for help or a trap. .
Price: $0.95 [Notify me when price goes down.]

Warned to never stay in his animal shape for more than two hours, Tobias forgets when he becomes involved in a rescue campaign and faces being trapped in a hawk's body forever .
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Elfangor-Sirinial-Shamtul is an Andalite war prince--the one who gave the Animorphs the power to morph. "The Andalite Chronicles" is the story of how this warrior-cadet ended up on planet Earth Ages 9-12. Pub: 12/97. ..
Price: $3.50 [Notify me when price goes down.]

The Yeerks have abandoned all secrecy They are loading people onto underground trains that run directly to the Yeerk pool where they perform mass infestations. The vast army of Controllers is growing rapidly and will soon be unstoppable. Ax and the Animorphs can think of only one solution‹to use one of the trains to blow up the Yeerk pool. But the cost will be measured in hundreds, perhaps thousands of innocent human lives. .
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The Animorph kids are joined in their fight against the evil Yeerks by Ax, an Andalite who is stranded on earth until his alien pals return and who is seeking revenge against the alien who killed his brother. Original.".
Price: $1.65 [Notify me when price goes down.]

The extraordinary conclusion to the best-selling Animorphs series. Jake, Rachel, Tobias, Cassie, Marco, and Ax know that even if they could have warned people in the beginning, no one would have believed their story. A story about an invasion of parasitic aliens. So, for all this time, Jake, the other Animorphs, and Ax have secretly fought a desperate battle. Secretly held the Yeerks at bay. But those days are over. And there are no more secrets. It comes down to the final battle between the Yeerks and Animorphs. And no one knows who will win, lose, or live . . . .
Price: $9.50 [Notify me when price goes down.]

Attempting to get more information about the Yeerks, the Human Controllers, Jakes is suddenly taken over by one of the parasitic aliens and becomes one of them, and the Animorphs launch a rescue mission .
Price: $7.64 [Notify me when price goes down.]