Really don't know how to categorize this. It is the story of Michael who is a paranoid schizophrenic who believes technology is monitoring him, faceless men are following him etc.. (something we hear quite a bit from such people). But even if you are paranoid, they still could be out to get you as the saying goes. Only as the story is told through his POV, it is often hard to figure out what is real and what isn't. Which is not only fascinating, but frustrating. This I feel, made me really invested in Michael's struggles to get better and figure out what is happening to him. His life is compounded as well by a series of killings where the victims faces have been surgically removed. Is he guilty, is it connected? This book raises so many questions along the way. As the pieces come together, it climaxes in a very unexpected way.