This is an excellent book that teases the reader into wondering if it is a psychological thriller or a supernatural horror novel. How you interpret it will depend on what psychological baggage you bring into this book with you. The narrator is a young man who goes to a therapist because he cannot bring himself to hold his own newborn child. His journaling reveals a childhood past in which he was either very disturbed, possessed by a demon, or perhaps both. The narrator is very unreliable as is the information he receives from the adults in his life. The author walks a tightrope and never falls. This is a very tense book and, while having its terrifying moments, succeeds many because of the subtle nuances throughout this tale. The ending is perfectly vague and leaves you pleasantly uncomfortable. Four and a half stars.