Or better yet (than Truck), check out "Mountains Beyond Mountains", about Paul Farmer's quest to defeat infectious disease where it's needed most and available least around the world.
Yes, reading that book made hearing about Farmer's recent death hit hard. Hopefully the system of clinics he set up in Haiti and elsewhere will survive long term after his death.
I have to say, I read quite a bit of that but got bored with it. Not that it's not a great story about important work, but at some point I felt like I'd read all I needed to.
