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 Theakston 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 in the NHS with a Master’s degree in the History of Medicine. In researching her degree, Marisa learned of the horrific procedures and maternal mortality rate of the time, the connections between early use of anaesthesia and the Royal Family, as well as the moral objections raised by the Clergy towards the use of such innovations in pain relief.