The fourth volume in the #1 Sunday Times bestselling Murdle puzzle series! 'UTTERLY ADDICTIVE!' JANICE HALLETT, bestselling author of THE TWYFORD CODE and THE APPEAL'AN ABSOLUTE PHENOMENON' RICHARD OSMAN, bestselling author of THE THURSDAY MURDER CLUB SERIESFreshman Logico arrives at the prestigious Deduction College with a keen interest in logic and a mission to graduate at the top of his class . . . when a series of mysterious killings occur in this fourth instalment of Murdle: The School of Mystery.Join Logico as he investigates tricky campus alliances, cut-throat student elections and trials for the varsity chessboxing team. Along the way, he'll glimpse robed figures in hidden tunnels and hear whispers of a secret society, all overshadowed by the unsolved death of Lord Graystone, founder of the school. Logico must determine whodunnit, how, where and why, before the final bell. And who better to help him than fellow student, the enigmatic Irratino?Examine the clues, interview the witnesses and complete the deduction grids to catch the culprits - and complete them all to unfold an even greater mystery before it's too late. Packed with illustrations, codes and maps, this is the seminal detective casebook to get those little grey cells firing!Not only the good die young! You'll need to be sharper than Sherlock if you dare to Murdle!