Quick recommendation
"the wilderness guardian"
by tim corfield
Is a handbook written for park rangers here in Africa. I saw it in Mozambique a few years ago. Bought a copy here in Nairobi a few weeks ago. Covers emergency medicine, tracking, construction, flying planes, camping... Lots of cool stuff. Probably a novelty for most people, and they just reprinted this year so there are a few around.
Dont know if it can be bought on amazon.
But the book is dedicated to the memory of David Sheldrick who I think was the first warden of Tsavo West National Park.
http://www.sheldrickwildlifetrust.org/Email those guys. I know they have some copies and for a small donation would probably ship it to you.
Cheers