Almost nothing could be as bad as finding out your mother is Visser One, the most powerful leader of the Yeerk invasion of Earth. But it happened to Marco. And even though he's been handling it pretty well, he knew there'd come a time when he'd have to face her again, knowing that the Yeerk in her brain has taken his mother away. So when Marco and the other Animorphs discover that Visser One is overseeing a secret underwater project, they know they...

As Grace hides the vast depth of her love for Sam from her parents and Sam struggles to release his werewolf past and claim a human future, a new wolf named Cole wins Isabel's heart but his own past threatens to destroy the whole pack.

When Sadie, a kindergartner, suddenly turns into a frisky leopard cub, her mother and brothers take her to a doctor, a veterinarian, and even a zoo seeking a cure.

Good friends Owly and Wormy are disappointed when their new plant attracts fat, green, bug-like things, instead of butterflies, until a metamorphosis occurs.

Albie, an enchanted rabbit who lived on the island of Hybrasil, visits each of her sisters, now living as humans, to decide where she wants to go before the island sinks.

A beetle courageously sets out in search of his best friend--a caterpillar that arrived out of nowhere and vanished without warning.

"Baseball is Roger McGillicutty's whole life. That is until one Saturday morning when he mysteriously changed from a normal eleven-year-old boy to a five-foot-tall praying mantis. Roger has school on Monday, the carnival comes to town next week, and his baseball team is poised to play their biggest rival in one week. Being a giant bug will seriously cramp Roger's style! But baseball may be the least of Roger's worries. Some people are frightened and...

In all the years she has watched the wolves in the woods behind her house, Grace has been particularly drawn to an unusual yellow-eyed wolf who, in his turn, has been watching her with increasing intensity.

"Rachel is still reeling from the news that Earth is secretly under attack by parasitic aliens, the Yeerks. Now she and her friends are the planet's only defense -- five kids who, purely by chance, stumbled onto a downed spacecraft and were given the power to morph into any animals they touch. The team's best lead is their assistant principal, Mr. Chapman, who is the human host to a high-ranking Yeerk official. It's not much, but Rachel's always been...

Impressed by the proud caterpillar's boast that she will turn into a butterfly when she grows up, a polliwog determines to watch the caterpillar very carefully and turn into a butterfly too.