Widow's Walk: A Spenser Novel (Spenser Mysteries) Hardcover – March 18, 2002 by Robert B. Parker 
 
When fifty-one-year-old Nathan Smith, a prominent local banker and millionaire, is murdered, Spenser is called in to investigate Nathan's young wife, Mary Smith, who has a weak alibi, likes to sleep around, and is despised by her peers, and as the evidence stacks up against Mary, Spenser soon discovers that Mary's mysterious past has put his own life in danger. 175,000 first printing.
 
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