Marisa Haetzman worked as a consultant anaesthetist, her career taking her to London, Edinburgh, Aberdeen and Glasgow before stepping down to study for a Masters degree in the History of Medicine. Her dissertation research into the early use of chloroform led to her collaborating with Chris Brookmyre, under the pseudonym Ambrose Parry, to write crime fiction set in the world of Nineteenth Century Edinburgh medicine. The couple’s first three novels were all shortlisted for the McIlvanney Prize, with A Corruption of Blood also shortlisted for the CWA Historical Dagger. Marisa Haetzman has also collaborated in adapting both the Ambrose Parry novels and Chris Brookmyre’s The Cut for television.