It's nothing like Gone Girl, at all. This is a British thriller/mystery type deal. The main female character is a well-conceived character that isn't perfect-that's about as close a reason I can find to a GG comparison. She's a fairly delusional drunk but much more sympathetic/relatable than Flynn's protags. Her POV is consistent and maddening to most sane people. I've seen other reviews that criticize her behavior like characters in a book should conform to some boring standards. If the character is a borderline stalker, then you shouldn't complain when she acts like a stalker. If you guess who it is, then good for you. There's about 8 characters in the book so you would've had a pretty decent shot without even reading the book. The whole idea of figuring it out who did it really isn't that obvious and it's not really the point of the book. I don't try to find out who did it as any reader should know the author can contrive any situation to make it any character so there's no point-it didn't really happen folks. Entertaining read once it gets going.