"The Mystery of the Strange Messages" is the fourteenth book in the "Five Find-Outers" series. In this installment, Mr Goon, who usually acts as the authority figure, finds himself receiving strange and unpleasant messages. The tables have turned, and now he seeks the help of the expert child detectives, the Five Find-Outers. The children waste no time in investigating the mystery, but they soon discover that there is more to unravel beyond the initial messages. This exciting book follows the adventures of the Five Find-Outers as they work to solve the puzzling mystery and uncover the truth.