Associate Professor Munjed Al Muderis is a world-leading osseointegration surgeon and Adjunct Clinical Associate Professor at the University of Notre Dame Australia in Sydney. He practises as an orthopaedic surgeon at the Norwest Private Hospital, Sydney Adventist Hospital and Macquarie University Hospital in Sydney's northern suburbs. He lives in Sydney with his partner, Claudia. Patrick Weaver is a highly regarded writer and public relations consultant who worked with Munjed on his previous bestseller, Walking Free. He lives in Sydney and has two adult children.