Fifth in the bestselling Inspector McLean series, for the first time in hardback. A body is found at the scene of a carefully staged murder. The victim has undergone a macabre ritual of purification in a sealed chamber. McLean must track down a killer with the darkest compulsions, who answers only to a higher power... For Ian Rankin, Stuart MacBride and Peter James fans. James Oswald was the bestselling debut crime author of 2013, and "Natural Causes" was crowned the R&J Summer Book Club Winner.