Forgetting their rivalry, Autobots and Decepticons join together in the face of a cosmic enemy--Unicron.

The Wump World is an unspoiled place until huge monsters bring hordes of tiny creatures from the planet Pollutus.

When the spectacular, sparkling explosions at a popular tourist sight slow down, Hedgie the hedgehog is the only one capable of flying to tiny planet Mikkop to see what is wrong.

Optimus Prime is a strong and powerful Autobot. When the evil Decepticons arrive, Optimus is ready to fight! Can he and his friends save the Earth before it's too late?

Marveltown's adults are outstanding inventors, but when their best engineers create giant but stupid robots that threaten the town, it is the children's outrageous creations that save the day.

"Michael and his friends, Sarah and Bryson, are still being chased by a cyber-terrorist. And now the government is after them, too"--

After falling in love, Lena and Alex flee their oppressive society where love is outlawed and everyone must receive "the cure"--an operation that makes them immune to the delirium of love--but Lena alone manages to find her way to a community of resistance fighters, and although she is bereft without the boy she loves, her struggles seem to be leading her toward a new love.

While her third-grade classmates are sprouting seeds in paper cups, Holly has a more ambitious, innovative science project in mind.

In an alternate 1914 Europe, fifteen-year-old Austrian Prince Alek, on the run from the Clanker Powers who are attempting to take over the globe using mechanical machinery, forms an uneasy alliance with Deryn who, disguised as a boy to join the British Air Service, is learning to fly genetically engineered beasts.

When a plague sweeps over the earth killing everyone except children under twelve, ten-year-old Lisa organizes a group to rebuild a new way of life.