As bodies continue to fall and the past bleeds into the present, Dr Alan Twist must confront a killer no one can see and a crime that defies logic.

Three young ladies are thrown into raging waters, seemingly pushed by an invisible hand. Six years later, when a famous actor is flung from his window, eye witnesses agree: it was as if he was shoved from behind by an unseen murderer, imitating the inexplicable death of a young lady in the same house over fifty years earlier. Renowned sleuth Dr Alan Twist and his partner Inspector Hurst go to the eerie landscape of Dartmoor to investigate. But invisible killers are hard to bring to justice…



Paul Halter is a French crime writer, known for his locked room mysteries.

His first published novel, La Quatrieme Porte (The Fourth Door) was published in 1988 and won the Prix de Cognac, given for detective literature. The following year, his novel Le Brouillard Rouge (The Crimson Fog) won the Prix du Roman d'Aventures.