Every week I throw out a few recommendations on things such as movies, books, knives, flashlights – all kinds of stuff. Some of these are not related to preparedness whatsoever – rather, just stuff I like. Most are available on Amazon but not all. I have a particular fondness for movies as one of my favorite things to do is to sit back and watch a good one.
You might consider FM 21-50 also. These manuals IMHO should be in hard copy in every prepper, self-reliant person and every retreat library. Backing them up with E-copies for archives. Read it, study it and practice as best you can. Andromeda strain was a goo movie, never saw the other two.