The Mirror Hardcover – January 1, 1979 by Marlys Millhiser 
 
Our all-time best-selling book isn't even a vintage mystery but it is perhaps one of the most beloved novels of all time. A 20-year-old Boulder girl stares into her grandmother's Chinese mirror on her wedding day in 1978, faints and comes to in her grandmother's body--in 1900--about to be married to a miner. As she moves through life, even giving birth to her own mother, she becomes known as a fairly decent seer. Had she paid more attention in school, she would have been a great one.
 
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