David Joyce is a physician practicing in clinical pharmacology and forensic toxicology. He is professor of medicine and pharmacology at the University of Western Australia, director of drug analysis services at PathWest Laboratory Medicine in Perth, Western Australia and head of clinical pharmacology at Sir Charles Gairdner Hospital, also in Perth. His consultative practice includes forensic toxicology in medical, coronial and child protection contexts.  Peter Winterton is a child protection and family physician with forty years of experience over a wide area of clinical and medico-legal  medicine. He has been involved in child protection work since the late 1970s when the recognition of child sexual abuse medicine became a recognized sub-speciality. From 1999-2013 he was Medical Director of the Child Protection Unit at the Perth Children’s Hospital. Especially during this period  he became increasingly aware of the interaction of drugs and child maltreatment. He has worked collaboratively with the other  author of this book on many cases, being the inspiration for putting this work together.  His unique combination of child protection medicine and family medicine has allowed him to appreciate the harm of  drug misuse across the whole community and its potential inter- generational  effects at every level of society, from prenatal exposure to adulthood.