The Missing Link - Ian Stephenson - Bog

Paris, 192-. Amateur burglar Arnaud Toussaint receives his first job: to have himself employed at the home of the unforgivably wealthy and intolerable Baron Saint-Pol, discover the location of his valuables, and help the entire gang into early and affluent retirement. But to set foot into that house is to tread its fatal halls; the shadow of an invisible enemy drapes over Saint-Pol, trust is an alien concept to all members of the household, and Toussaint transforms from a silent observer to an eyewitness of the baron's mysterious disappearance...