You would probably like 
Three Cups of Tea. 
 
I don't know if you are more interested in domestic or international efforts. Let me know. Robert Egger is one of my personal heroes and relatively recently wrote a book called 
Link Removed. Although his humanitarian efforts are mostly domestic, this is a must read in my opinion for anyone interested in the nonprofit sector. He is very inspiring and pragmatic. 
 
But based on some of your previous posts I think Three Cups is pretty up your alley, also 
Link Removed. 
Link Removedis an interesting story full of moral questions that I think is a good read on issues of cultural divide in humanitarian efforts. 
 
On genocide: I don't know exactly whether we're going for journalistic, anthropological, etc. Chris Hedges, 
Link Removed, is pretty good, mostly analytical. I just finished 
Link Removed and I was impressed by the treatment of historical and anthropological themes, but the subject matter is pretty heavy. I think it does really illustrate the extent to which systematic torture (and clandestine inter-state activity to that end) represents government sponsored terrorism and should never be tolerated. Also a good illustration of the extent to which Cold War rhetoric was used in the western hemisphere to justify undercutting true democratic practices, which I think is applicable to some of the rhetoric we are exposed to today...this book is about Argentina's Dirty War, a campaign against "subversive" political activity, and of course there's some controversy as to the extent to which such a campaign represents genocide. Which is an interesting debate in itself though the book doesn't really touch on it. 
 
There are a variety of case studies like this though, based on other countries, if I recall you are interested in Uganda. Ishmael Beah's (Sierra Leone) memoir 
Link Removedis good, but off the top of my head I can't think of anything specific to Uganda.