Letters in the Pines (A Detective Riley Quinn Pine Brooke Mystery Book 5)

Detective Riley Quinn receives a bloody letter containing peculiar riddles arranged like a crossword puzzle. Despite skepticism from her peers, who believe it may be a prank, Riley is convinced the letter holds vital clues to a murder case. Her initial attempts to solve the puzzle lead to dead ends, but she persists in her investigation. Following the puzzle's clues, Riley discovers an abandoned construction site—the remains of a planned mansion and elaborate grounds that was left incomplete when funding ran out. While exploring the deserted backyard entertaining area, she uncovers a discovery that redirects her entire investigation. The case becomes entangled with bloody trails, deadly codes, secret letters, and an increasingly complex game.