I just finished a book on Michael Collins and the Anglo-Irish war. Very interesting. It occurs to me that because of the antagonists in that war there is a lot in English available about the activities and thoughts of the insurgents. One book that I haven't read but that looks interesting is called Guerrilla Days in Ireland by Tom Barry. He was a flying column commander.

This is the only small war I can think of where you can so easily get both sides of the story.