I really loved McMahon's Don't Breath a Word, but this thriller just didn't hold up for me. There's a lot of time jumping in this book, both in chapters that alternate between the present (2010) and 25 years prior, further compounded by constant flashbacks within the POV character's thoughts. While McMahon's prose is smooth, precise and unencumbered, the constant flashbacks, especially within the first quarter of the book, kept bouncing me out of the narrative and made the book a tougher read than I'd expected.But mainly I'm giving the book two stars based on the serial killer plot, which I found both predictable (the murderer is relatively easy to guess early on) and unbelievable by the end. The strengths here are the characters. Reggie Dufrane is a fine protagonist, and her relationships with her friends and struggles with the issues of her family and past are all compelling. If you enjoy McMahon's characters, it's still worth the read. I just found myself wishing that the book had dealt with its serial killer in a more realistic fashion, perhaps by leaving it unsolved, because the resolution presented felt predictable, forced and unbelievable to me.