Wow, I thought I had read all the relevant 2p2 mammoth threads but somehow I'd never come across this until it popped up on twitter a couple of days ago. Read the whole thing in one sitting, amazing read and I'm so glad you made it into a book in the end. Definitely going to order one once my credit card finds it way to this god-forsaken island. As someone who's been struggling with publishers for a while now and strongly considering going to self-publishing route for his book,
also spawned by a 2p2 thread, I'd be very curious to read a post about how the experience was for you, if you ever find time to write one.
Anyway, best of luck with your book and thanks for sharing your experiences! Really makes me want to go to Uganda, too.