The British Special Air Service (SAS) is an elite military unit trained for long range patrols,sabatoge and covert operations far behind enemy lines. The U.S. Navy SEAL teams are trained on principles developed by the SAS nearly fifty years ago. SAS troops are deployed to some of the most remote regions on the planet and for this reason, must be experts in outdoor survival. John Wiseman is a former SAS survival instructor, so you can rest assured that you are receiving the best available information. The techniques desribed in this book are simple, functional and extremely clever, all hallmarks of SAS operations. The section on traps and snares is spectacular! All drawings are clear and easy to understand and the book is organized into specific geographic regions according to climate(i.e. deserts, jungles, etc.). I have spent most of my professional career in the woods (I'm a biologist by trade)and I use the information in this book on a daily basis, including training fellow employees in the basics of land navigation, improvised direction finding, and basic "woodsmanship". Additionally, I apply the SAS mindset to daily problem solving and find that it serves me well. The book comes in two sizes and I can highly recommend the pocket sized version for your pack or field bag. I can not say enough good things about this book. I have over fifty survival books in my personal library and this is the one I use as my bible. I can also highly recommend the SAS Escape,Evasion and Survival Manual by Barry Davies. It contains the same high quality info. as this book plus some additional goodies!