Ben 10 Alien Force Volume 1  Ben 10 Returns Paperback – December 30, 2008
by Cartoon Network (Author)
IT’S HERO TIME!

Fifteen-year-old Ben Tennyson has awesome superpowers–thanks to the Omnitrix, which he can use to transform himself into ten incredible alien life-forms. Then one day, Ben chose life as a normal kid and put away the Omnitrix for good.

Now, five years later, the world needs Ben. Grandpa Max has been kidnapped, creatures from outer space threaten to destroy Earth, and only Ben and his superpowered friends Gwen and Kevin can save the day!
Ben 10 Alien Force  Volume 2  Doom Dimension: Manga Paperback – July 27, 2010
by Peter David  (Author), Dan Hipp (Illustrator)
THE ADVENTURES OF BEN 10 ARE OUT OF THIS WORLD
 
Ben 10 remains stuck in the Fourth Dimension with Aztak, a bounty hunter who’s hit the jackpot and can’t wait to cash in—as soon as he sells the fifteen-year-old superhero and his amazing Omnitrix to the highest bidder.

Meanwhile, Ben’s friends Gwen and Kevin think Ben’s been murdered. They blame the Forever Knights and can’t wait to annihilate the tech-stealing scoundrels—if they can ever find their hideout. But the Forever Knights plan to zap Gwen and Kevin with a weird gadget they grabbed from Aztak’s crashed spaceship (once they figure out how it works).

Unfortunately for all concerned, that particular gadget has the power to blast everybody (and a good chunk of the neighborhood) to smithereens—unless Ben escapes the Fourth Dimension, eludes Aztak’s clutches, and finds the Forever Knights’ lair and his pals before time runs out.