Search - The Crimebusters Investigate (Usborne Puzzle Adventures, 25)

Five sinister suspects...baffling evidence...and a criminal mastermind whose activities threaten to tear apart the old city of Allegro...all this awaits Kaz Smiley and her friend Mat when they set out to investigate the theft of a mysterious jewel known as the Traitor's knot. Can they crack the case before it's too late?