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This was a very entertaining psychological thriller about Rosie, a heart transplant recipient, who is obsessed with the donor's husband. The despair some feel after being dumped and their deep desire to find someone else is central to the plot. The book reads a bit like a rom-com until about midway, at which point there is a surprising twist and the thriller aspects become obvious. I really enjoyed the book. Thanks to Edelweiss+ for the ARC. 4/5!