Trouble is brewing once more for the Hoggetts and their friend Chief Inspector Macdonald in Lunesdale, deep in the Lancashire fell country. The treacherous slopes and still waters of a quarry pool have become the backdrop for strange happenings by night, and after an architect surveying the area is nearly hoisted into the cold waters by an unseen assailant, the suspicions of local farmers become a matter for the CID. Lorac's authentic writing of the Lunesdale countryside is paired with a twisting plot in this classic of lake district crime fiction, first published in 1949.

E.C.R. LORAC was a penname of Edith Caroline Rivett (18941958), who also wrote as Carol Carnac. She was a prolific author of Golden Age mysteries publishing over sixty novels throughout the 1930s, 40s and 50s. She was also a member of the famous Detection Club. Her books include Crossed Skis, Post After Post-Mortem and Crook o' Lune, all available as British Library Crime Classics.