Evolution is the action-packed fourth installment in the thrilling Exlian Syndrome series by beloved author Seth Ring. Abandoned by society and thrown into a brutal underground city, it took all of Mark’s wits and courage—and more than a little help from his friends—to escape. After returning to the surface, Mark has a new lease on life. But it turns out that he may have been safer stuck underground with a bunch of murderers. With his old identity dead, Mark’s only choice is to forge a new life as Apex, a freelance hunter. Venturing out of New Emery to hunt, Mark quickly learns that he’ll need a lot more than raw strength to survive in the cutthroat world of hunters. To make matters worse, a strange breed of Exlian has taken an interest in Mark and has begun to hunt him in turn, transforming each bounty he undertakes into a potential deathtrap. As Mark struggles to keep his life together, he finds his relationships beginning to fracture as different groups seek to control him, trying to claim his growing power for their own ends. Feeling less human every day, Mark’s constant evolution forces him to face the ultimate Will he be able to protect New Emery and its people, or will he become the force that destroys it?