I have not read this book.  Let's just come clean on that right off the bat.  It's brand new. 

I
corresponded for a while with Emmanuel Jal while living in Oxford and
trying to figure out a way to use music, and hip-hop especially, to
document life and stem the rising tide of gang violence among Sudanese
refugee youth in Cairo who had fled the civil war, the genocide in
Darfur, or any number of other threats in the Sudan and along the way. 
I had spent the previous year with one of the gangs, hearing stories of
transit and tragedy, hope and reconnection, and ultimately desperation
and frustration (refugees have rights under international law, but
nobody actually provides them, and Sudanese certainly aren't 'priority'
refugees).

Emmanuel Jal came to my attention as an up-and-coming rapper in
London who was working to draw attention to Sudanese refugees and
battling the 'weak and helpless' refugee-camp stereotype used to
promote guilt-reduction-through-your-wallet TV ads.  Jal's story
is simultaneously unique and replicated everyday.  Only the luckiest of
refugees make it to Europe (and have books and documentaries about
them), but this doesn't belittle the journey.  Understanding what
happens to refugees in the world is, unfortunately, an understanding of
how dark international politics really is.

Why not start with War Child and see how the journey begins?