James Powell is a clinical psychologist to children, adolescents and families and a consultant psychologist for US military personnel stationed in the UK midlands region.

He was previously CEO and senior psychologist for Carolina Psych Group, specialising in behavioural healthcare and mental health services clinic serving families, juveniles, and adults within North Carolina.

David Horner, AM, FASSA, is an emeritus professor in the Strategic and Defence Studies Centre, Australian National University. He served as an infantry platoon commander in the Vietnam War and later, as a colonel, was head of the Australian Army's Land Warfare Studies Centre.

He is the author or editor of 37 books on Australian military history, defence and intelligence, including The Spy Catchers, SAS Phantoms of War, Duty First, Blamey, and Battles that shaped Australia.