The Teenage Mutant Ninja Turtles enter the Kraang's otherworldly home, Dimension X.

"Battling robots and eating pizza are all in a night's work for the Teenage Mutant Ninja turtles"--Page [4] of cover.

"Raphael, Leonardo, Donatello, and Michelangelo love battling bad guys...until an unstoppable force emerges from deep beneath New York City he Turtles finally met their match?"--

Join the Turtles as they battle bad guys in space!

Can the Teenage Mutant Ninja Turtles defeat evil aliens and a superintelligent, mind-reading monkey?

I am Master Splinter. For many years now, I have been sensei to the greatest team of warriors I have ever known: the Ninja Turtles. Being their teacher in these ancient skills and guiding them as they have come of age has been the greatest honor of my life. If my great students, the Ninja Turtles, should ever be defeated, other worthy heroes must rise up to defend the world. As you read these lessons, you may discover that it is you who are worthy....

The Turtles return from Burnow Island to find unimaginable tragedy. As the family struggles to cope, an enraged Foot Clan prepares its revenge. Meanwhile, Casey prepares for a final showdown with Hun as the Purple Dragons run amok.

Recovering from the events of "City Fall," the Turtles seek sanctuary in the countryside, but questions remain unanswered. As tension festers, the brothers cope in their own ways, each drawn to their own path. But as the past haunts their future, can they unite as a family again?

The evil Shredder believes he's found what gives the turtles their power and proceeds to create dangerous mutants. Armed with Professor Perry's anti-mutant antidote, it's up to the crime fighting turtles and a pizza delivery boy to conquer these mutants.

The Turtles learn the amazing story of their previous lives, and begin their journey as a true team of brothers! Meanwhile, Baxter Stockman unveils a deadly new strategy for capturing them ... just as General Krang arrives in New York demanding results!