Yeah I tought that I will have a separate manual for different scenarios and it kind of worked out that way. I think they are trying to target two groups of people with these separate volumes. First group is those who really only do stuff in one specific region aka Jungle and Artic survival is really not that important for them. Second group are people who belive that four volumes is better than one. So instead of buying one SAS guide they will buy all four hoping for more in depth info. I fell into the second category when I hinted I wanted these books as a gift.

Again they are informative volumes.Iit's just that when you own all four, first half of the book is identical in all of them.

Matt