I saw a Lt. Col. being interviewed on TV about the Army & USMC’s new counterinsurgency field manual based on their experiences in Iraq, it is available in PDF from here. I’ve only read the Intro so far – the book itself looks pretty dense.
I also found a site with tons of Field Manuals, apparently in the public domain. Some look useful, like First Aid and “How to Avoid Getting Lost”, a lot are of interest only to military personnel. A few look like they’d be popular with folks hiding from black helicopters in Idaho.