Instruct: Classify a given Amazon review as either positive or negative.
Query: A keeper

Like most time-travel stories, this is a meditation on destiny and free will, with a plot driven by paradox dilemmas. I've rarely read such a fresh and moving treatment, however. The author wisely avoids too much investigation into the explanation for the time travel and concentrates instead on the impact on lives and characters; it's not science fiction but a traditional novel. I found this a very, very appealing book. I'm looking forward to the movie.