Instruct: Classify a review into positive or negative sentiment.
Query: Classical mystery story for people enjoying problem-solving

KILLING COUSINS by Gene Stratton, published by Ancestry, Inc.is a classical Agatha Christie-style tale brimming over withsuspects and clues (Kirkus Service called it "a prime exampleof the bygone, ever-so-civilized mystery"). The detectivesare a middle-aged savant and a vivacious younger woman whomesh beautifully as they solve a series of murders on anisolated island where everyone is related to everyone else.The story educates and entertains against a background ofgenealogy and genetics. The fact that the author is myhusband doesn't interfere with my complete objectivity inthis review in any way. Ginger Stratton