I've always thought a good book on survival is a must. Probably because Imo no one person could have all the survival techniques for every situation. In my own "library" besides fiction, I have several books on knots, survival, bowyer, flintknapping, native skills, etc..

I replaced a pocket edition of "sas survival guide", my last one was lent to someone and never got it back. At the hardware store I found "pocket ref", refered to in mythbusters before. It was only $5 and I thought it would be a nice addition. So it got me thinking, what other books do you guys keep with your BOB, WTSHTF, etc..? (if any) Do you have any other "portable", shirt pocket books you like?

Geo