SAS Survival Manual, by Lofty Wiseman. Outdoor Survival Skills, by Larry Dean Olsen, Any of Ragnar Bensons' books on survival (half a dozen of them) especially Survival Poaching and How to live off of the Land in City and Country, Brad Angier's How to live in the woods on pennies a day. Bushcraft, by Mors Korchanski. and anything by Ray Mears.