The Conover book is one of my favourites. I've found the various military winter survival and operations manuals to have excellent tips also. Calvin Rustrum's Paradise Below Zero was inspirational to the Conovers. It is dated, shy on detail, but a fun read. Any anthropological study or book dealing with northern peoples is going to be full of anecdotal information. Early arctic explorers were told to never eat bear liver by Inuits. As it turns out, the liver holds excessive vitamin counts that are toxic.