I have Samuel Culper's "SHTF Intelligence" which is a non-fiction analyst's guide to community security. Culper certainly knows his material. The book gives you the basis for becoming your group's intelligence analyst. Some of the book material is dry, but it is informative and comprehensive. The book could help you to discover previously unknown threats, and allow your group to find a method to counter those threats.
Anyways, Culper's blog is well worth the time.