Chris McNab is a wilderness expert, military specialist and author of over 20 survival publications, including How to Survive
Anything, Anywhere, Living off the Land, and SAS Training Manual: Endurance Techniques. He holds a PhD from the University
of Wales and lives in south Wales, UK. Martin J. Dougherty is a freelance writer specializing in military and defence topics.
He is the author of Medieval Warrior, SAS and Elite Forces Guide Extreme Unarmed Combat, and SAS and Elite Forces Guide Sniper,
Small Arms: From the Civil War to the Present Day, and books on personal self-defence. He lives in northern England.