Caroline de Costa is professor of obstetrics and gynaecology at James Cook University College of Medicine in Cairns. She has been involved in women's health care and advocacy for improved health services for women for more than 45 years. She has practiced in Australia, Papua-New Guinea, Ireland and the UK. She has written many books for women about their health, and a number of textbooks. In 2008 her non-fiction book about caesarean section, Hail Caesar, was shortlisted for the Queensland Premier's Literary Prize in Science Writing. She has always had a passion for reading crime fiction; more recently she has begun writing it. Blood Sisters is the third in her Cass Diamond series set in Cairns.