From my other GR friends' reviews, I am definitely an outlier here, so take this review for what it's worth, but I didn't love this book. In all fairness, Hamilton's previous book, "The Last Wife" was a DNF for me, so it may just be that this author and I are not a good fit.
Charlotte and Sam are married con artists, swindling cruise ship guests out of money, jewelry, and even identities. They both love the thrill of the chase - more than they even loved each other - but then things went too far, and Charlotte finds herself alone, trying to put her past behind her. She soon learns that Sam is missing, but she believes he is still out there somewhere, pulling the ultimate con, as she starts receiving messages and gifts that have an ominous link to Sam. The lies and destruction soon catch up with Charlotte, and she realizes that although she may have left her past behind, someone is determined to ruin her future.
I did like the Caribbean cruise ship setting, and the premise of scammers becoming the scammed; but that's pretty much where my "likes" ended. This is definitely a slow-burn thriller - especially the "then" sections where there is a never-ending rehashing of Sam and Charlotte's backstory. I didn't find their cons overly believable, and just a few "then" chapters would have sufficed. But even in the "now" sections, I never connected with Charlotte's character - she may have been trying to live life on the straight and narrow, but she seemed to have little remorse for her past actions and victims, which made her just too unlikable for me. I also found the tension to be lackluster at best. I never felt myself on the edge of my seat wondering what was coming next. The secondary characters on the yacht were also impossible to keep straight - they were all rather boring and one-dimensional, and because of that I never really suspected any of them of nefarious dealings. I pretty quickly surmised who was behind everything, so I was disappointed to get to the end and find out I was right. Oh, and the Alexandra storyline was just weird and over-the-top. And there you have my summary in a nutshell.
Overall, maybe I had too high expectations going in, but I needed more. It was just a flat, middle-of-the-pack read for me. 3 stars.