One should have the principles of any publication well before you must implement them. I have a mental picture of someone hunkering down in a blizzard and turning to the chapter on fire starting. Hopefully your e-reader will function in sub-zero conditions.

Still there is good stuff out there. As a certified geezer, I still refer frequently to my well worn copy of Pond and Nesbitt's Survival Book - lots of data and analysis, together with pertinent anecdotes, spiced with charmingly outdated language. Apparently in 1959, women didn't need to concern themselves with survival.

Another good one is James Wilkerson's Mountaineering Medicine, especially the most recent (3rd) edition.

I don't intend to place any of these in my pack when venturing out. I read and practice in advance and save the weight and space for more critical items.