This book has been coming up in suggestions for me for a while, and I’ve always passed it by until now. WOW, am I ever glad I finally gave it a chance! This was a fantastic book.First of all, the way the book was written was unique and interesting. Normally I’m not a huge fan of time jumps, as it often breaks momentum for me. This time, however, they fueled the momentum. The “letters” were carefully constructed with clever and effective red herrings and just enough insight into the couple’s past to have you constantly rethinking what’s actually happening.Second, the twists, especially *the* big twist, absolutely bowled me over. If anyone else guessed the whopper twist in there, I can gladly accept that they are smarter than I am! This author sneaked things by me like none other - I had no idea I was being duped for the majority of the book. Loved it!The ending was a little unfinished - it seems reality was distorted for me right up to the very end. Fantastic, but I felt the end was just slightly unresolved for me. Regardless, it was too good not to give it all 5 stars!! I highly recommend this book to anyone who loves a super complex puzzle to solve, and will be reading more by this author!