The first thrilling mystery in the number-one bestselling, award-winning Murder Most Unladylike series. Now with a brand-new introduction by the author, and a gorgeous, collectible new package with gold foil detail and sprayed edges.'Perfect' The Times 'Robin Stevens is Agatha Christie for children' Katherine RundellAt Deepdean School for Girls, best friends Daisy Wells and Hazel Wong have set up their own detective society. But they are struggling to find any real crimes to investigate. (Unless you count the case of Lavinia's missing tie. Which they don't.)Then Hazel discovers the Science Mistress, Miss Bell, lying dead in the Gym. To add to the mystery, when she and Daisy return five minutes later, the body has disappeared.Now the Detective Society not only have a murder to solve; they have to prove one happened in the first place . . .Discover the beloved murder mystery phenomenon that has sold over a million copies.'Plotting is what sets this book apart' Telegraph'Enormous fun' Irish Times'Thrilling' Guardian 'A skilful blend of golden era crime novel and boarding school romp . . . Top class' Financial Times