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Bonnie Pinkwater returns in this second book in the series that follows a math teacher with a knack for solving mysteries in her small Colorado town. When the wrestling coach is found murdered, Bonnie enlists the help of a student to find out what really happened. Suspects soon turn into victims, however, as more people are killed and less is known about the culprit. Just when she thinks things can't get any worse, Bonnie's beloved dog is kidnapped, raising the stakes even higher. A thrilling adventure with twists around every corner, this mystery uses math and its history to unravel the secrets of the crime and hopefully bring another killer to justice.