Some time in the past I went to a used bookstore in town. As luck would have it, an ex-GI had sold all of his manuals to the store. I bought the entire collection. There are books about weapons (.50, M-60, Bazooka’s, LAW rockets, etc) NBC equipment, conditions and how to fight when someone gases, nukes or bacterializes the battlefield. There’s stuff for spec-ops, engineers, field medicine it’s a bit mind boggling what all was in there. I’ve been slowly going through them to see what to keep and what should go. Too many decisions... I know of one book I don’t want to keep. Two copies of field sanitation is overkill.
The best place to look for this stuff is the second hand store on every Post. My son the cop loves it when I bring home an old TM, or TB. He reads them cover to cover.