Gerrie McCall is a graduate of the University of Houston and now works as a freelance writer living in Austin, TX. Her books include Dinosaurs and Monsters & Villains of the Movies & Literature.
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.