The Fantastic Four must stop a deadly threat from a parallel dimension in the New York Times-bestselling author's action-packed adventure novel. They are known across the world as humanity's greatest protectors: Mr. Fantastic, the Invisible Woman, the Thing, and the Human Torch. Each possesses incredible powers, and together they are considered unstoppable. But now the Fantastic Four must face a devastating threat unleashed in their own backyard when a portal to another dimension opens up in New York City. Creatures from the Negative Zone are wreaking havoc across the city and even within the walls of the Baxter Building-the Fantastic Four's high-tech headquarters. But the attack is just the beginning of an interdimensional war for control of Earth. To neutralize the menace before it escalates, the team must not only stop the invaders, but also venture into the Negative Zone and confront the evil at its source.