Crack over 90 devilishly puzzling cases in this hardboiled collection of crime conundrums.

Written by internationally best-selling author Dr Gareth Moore, The Private Investigator Puzzle Book puts you in the shoes of a seasoned sleuth for hire, as you use every tool in your investigative arsenal to analyze crime scenes, identify suspects, decipher riddles and bring the city's criminals to justice.

As you venture into a dark and gritty criminal underworld in search of answers, you'll test your wits in a variety of verbal and visual puzzles, spot the difference, code-cracking cryptograms, hanjie, sudoku and much more. Each scenario is unique, the stakes are high and it's up to you to clean up the streets, one case at a time.

Featuring dozens of mysteries, The Private Investigator Puzzle Book is a compelling collection of challenges that lets you channel your inner Dick Tracy or Philip Marlowe, and the ultimate puzzle book for fans of detective fiction.