Three Emily Castles mysteries now available in one bundle of fun. THREE SISTERS. Join twenty-six year old amateur sleuth Emily Castles at a bonfire night party hosted by a mysterious troupe of performers as she conducts her first murder investigation. In SHOWSTOPPERS, Emily investigates blackmail and murder at a London stage school. In REAL ELVES, Emily has fifteen minutes to solve a puzzle in a London department store that will stop Christmas being ruined for a young child.