Policemen Harpur and Iles get mixed up in the criminal world of fine art dealing Detective Chief Superintendent Colin Harpur feels a sort of warmth towards Jack Lamb, a brilliantly prosperous but profoundly dodgy fine arts dealer. Lamb is the greatest informant Harpur has ever dealt with - might be the greatest informant any police officer has ever dealt with - and although Jack ended this arrangement some time ago, Harpur still feels indebted to...