I thought the dynamics of the siblings repeating something that happened in the past was interesting, and uncovering the family history they found out shocked me a lot. However, I do feel like the book could have been shorter or could have been restructured a bit because there were so many lulls that made me lose interest in what was happening with both Louise and Mark. If you're a fan of Annabelle, The Conjuring, and other things like that, you'll definitely like this.