Lieutenant Colonel George Hulse (Retd) OAM was a combat engineer, a 'Tunnel Rat' in the Vietnam War, and fought at Coral-Balmoral-Australia's largest battle in that war. He served with distinction in Malaysia, Kashmir and Papua New Guinea until his discharge in 1980. George went on to become a Lieutenant Colonel in the Army Reserve and published a book about Australian military working dogs, In Dogs We Trust. George has since had numerous volunteer roles including as Vice President of the Australian Defence Force Trackers and War Dogs Association. He also competes in Ironman Triathlon races. Jimmy Thomson has co-written three books about Australian sappers (with Colonel Sandy MacGregor): Tunnel Rats, A Sappers' War and Tunnel Rats versus the Taliban. A journalist for more than forty-five years, he has written true crime, sports biographies and military history. He writes crime fiction under the pen name James Dunbar and lives in Kings Cross, Sydney, with his wife and their cats.