This book has had a lot of buzz, and comparison with Gone Girl (like so many hot books these days.) It was a fast read, but I found the plot predictable and not that interesting. While the chapters switch between "Before" and "After", there wasn't much suspense around what happened in between. I didn't find the characters all that well-formed, but rather caricature-ish. 
 And a small thing: one of the main characters has the same name as a Canadian politician who murdered his wife. It was a little jarring for the first few chapters.