When they were caterpillars, Moth and Butterfly were very similar but as they undergo metamorphosis, everything changes except their friendship.

Follows the progress of a hungry little caterpillar as he eats his way through a varied and very large quantity of food until, full at last, he forms a cocoon around himself and goes to sleep and wakes up a butterfly.

Follows the progress of a hungry little caterpillar as he eats his way through a varied and very large quantity of food until, full at last, he forms a cocoon around himself and goes to sleep. Die-cut pages illustrate what the caterpillar ate on successive days.

When Gabby Gomez's substitute teacher transforms into a giant hamster monster, she needs help from new friends and old to stop him.

When cold weather arrives, five friends (a grub, a beetle, two worms and a caterpillar) prepare for the winter. They amuse themselves in conversation and by playing games. But a little caterpillar only wants to sleep and dream.

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

"Sometimes weird things happen to people. Ask Jake. He could tell you about the night he and his friends saw a strange light in the sky that seemed to be heading right for them. That was the night five normal kids learned that humanity is under a silent attack -- and were given the power to fight back. Now Jake, Rachel, Cassie, Tobias, and Marco can transform into some of the most dangerous creatures on Earth. And they must use that power to outsmart...

Only Gabriel cannot decide what animal to draw and talk about in school, until he finds a wonderful little caterpillar, feeds it, then watches as it builds a cocoon and, one day, flies away as a beautiful butterfly.

In a "choose your own adventure" story, the reader can decide what he or she would do if given the chance to become an Animorph, join Jake and the crew, and battle the Yeerks.

Andalites have finally arrived on Earth. The Animorphs and Ax now have allies willing to fight against the Yeerk invasion. But there are only four Andalites. Not nearly enough to defeat thousands of Yeerks. Not enough to stop more humans from being infested. Will Ax leave his friends in the Animorphs or stand with his people?