I don't take anything to the woods. I find plenty to read there, in the brush...under the leaves, even on the underside of a dead log. People write about their own experiences mostly, and I can read them after dark, in the house or cabin/tent. The woods is trying to convey a good story...we just need to know how to read it.
Now....that is not what you asked, so I'll give you a few that I read when not in the woods 8^). Archery: From Golds to Big Game....Keith Schuyler.
Forty Years of The Life of a Hunter...Meschak Browning. The Good Samaritan Strikes Again...Patrick McManus. I'm currently looking for some new material...lots out there, new and old.