I've read J'ai saigné (I bled, in English) this morning : it's just one short story by Blaise Cendrars, about his recovery in 1915, because he lost his hand and part of his arm in the first world war.
The story is interesting to read, and it packs a punch. I'm one of those persons who cannot stand to see someone in pain, and this book affected me (my throat is still tight a few hours later). The suffering of the soldiers is so vivid, I can't imagine someone not being moved by this story.
Finally, the writting is very good, it's a big part of the power of this short story. I've read it in French (my mother tongue) and I hope you can find a good English translation.
I recommand reading this story, for everyone (aged 14-15 and up), especially if you like history, reflections on war and human nature.