Stephen King hailed Michael Marshall's novel Straw Men as “a masterpiece . . . brilliantly written and scary as hell.” Now, Marshall returns with this latest unnerving tale—a creepy, fast-paced thriller that grips you from the first page straight through to its shocking end.

Bill Moore already has a lot, but he wants more . . . much more.

He's got a lucrative job selling condos in the Florida Keys, a successful wife, a good marriage, a beautiful house. He also has a five-year plan for supersuccess, but that plan has begun to drag into its sixth year without reaping its intended rewards. So now Bill's starting to mix it up—just a little—to accelerate his way into the future that he knows he deserves.

Then one morning Bill arrives at work to find a card waiting for him, with no indication who it's from or why it was sent. Its message is just one word: modified.

From that moment on, Bill's life begins to change.

At first, nothing seems very different. But when things begin to unwind rapidly, and one after another, people around Bill start to die, it becomes increasingly clear that someone somewhere has a very different plan for Bill's future. Confused and angry, Bill begins to fight against this unseen force until he comes to a terrifying, inescapable realization: Once modified, there's no going back.