TMNT: Journeys (TMNT: Journeys #4)

The Turtles' winter is growing longer, and they are growing more restless with it. As the mysteries behind the van they uncovered begin to grow, and a strange craft from space lands on Earth with familiar foes and new ones alike, this brand-new chapter in the life of the Ninja Turtles will be their most perilous, deadly, and challenging adventure to date. Robots, aliens, assassins... and that's just the start of it.