Ambrose Parry is a pseudonym for a collaboration between Chris Brookmyre and Marisa Haetzman. The couple are married and live in Scotland. Chris Brookmyre is the international bestselling and multi-award-winning author of twenty-one novels, including Black Widow, winner of both the Theakstons Old Peculier Crime Novel of the Year and the McIlvanney Prize for Scottish Crime Novel of the Year. Dr Marisa Haetzman is a consultant anaesthetist of twenty years’ experience, whose research for her Master’s degree in the History of Medicine uncovered the material upon which this novel was based.