Her Dad's a private investigator and a retired St. Louis police detective. Mercy's parents are on vacation and she's enjoying the break from their presence. Then a close family friend, her Dad's ex-partner, dies of a heart attack. Mercy has to call her parents with the news, and then she finds herself on the hook to solve the mystery surrounding the death. There's suspense, danger, and plenty of humor in this great story. The quirky characters and settings add to the book's appeal. Very highly recommended.