A fantastic bumper volume of classic stories from a much-loved author. The Mystery series follows the adventures of "The Five Find Outers"- Pip, Bets, Larry, Daisy and Fatty, as they solve the most mysterious cases with the help of their dog Buster. This secondvolume collects books 4-6 in the series: The Mystery of the Spiteful Letters, The Mystery of the Missing Necklace and The Mystery of the Hidden House.