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

The five midnighters from Bixby discover that the secret hour is starting to invade the daylight world, and if they cannot stop it, the darklings will soon be free to hunt again.

When thirteen-year-olds Jonah and Chip, who are both adopted, learn they were discovered on a plane that appeared out of nowhere, full of babies with no adults on board, they realize that they have uncovered a mystery involving time travel and two opposing forces, each trying to repair the fabric of time.

When someone plots to take over New York City, it means danger for the Austin family and their friends.

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

Commanders Belka and Strelka, of the planet Gersbach, board their dog-shaped vehicle and head for earth, where they encounter Lucy Buckley and her family, attempt to capture two power-seeking renegades, and hope to save their own planet from destruction.

"A twelve-year-old boy is chosen to join a four-person applicant team to work towards membership in the Confederation of United Planets, and stumbles across conspiracies resembling science fiction he's been a fan of his entire life"-- Provided by publisher. "A twelve-year-old boy is chosen to join a four-person applicant team to work towards membership in the Confederation of United Planets, and stumbles across conspiracies resembling science fiction...

Sixteen-year-old Nica Ashley moves to sleepy Barrington, Colorado, to live with her father and discovers a mysterious pulse of energy has given her and her friends superhero-like powers.

When thirteen-year-old Luke Garner unwittingly sets off a rebellion which sweeps the country and ousts the Population Police from power, he quickly realizes that the new regime is corrupt and he may hold the only key to true freedom.

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.