Longlisted for the CWA Historical Dagger Award ''Ingeniously plotted ... my favourite historical crime series.'' S. G. MacLean''A rattling good read'' William Ryan----------------------------------Treason sleeps for no man...London, 1591. Nicholas Shelby, physician and reluctant spy, returns to his old haunts on London''s lawless Bankside. But, when spymaster Robert Cecil asks him to investigate the dubious practices of a mysterious doctor from Switzerland, Nicholas is soon embroiled in a conspiracy that threatens not just the life of an innocent young patient, but the overthrow of Queen Elizabeth herself.With fellow healer and mistress of the Jackdaw tavern, Bianca Merton, again at his side, Nicholas is drawn into a sinister world of zealots, charlatans and dangerous fanatics...Praise for S. W. Perry''s Jackdaw Mysteries''S. W. Perry is one of the best'' The Times''No-one is better than S. W. Perry at leading us through the squalid streets of London in the sixteenth century'' Andrew Swanston''Historical fiction at its most sumptuous'' Rory Clements