I've just finished Ernst Jünger's "Storm of Steel" - he was a highly decorated German veteran of the first world war. Most of the books I've read about that (or any other) war have been strategic or tactical overviews; this is a personal look at how an average soldier's days were spent at the front. It's very explicit in terms of the horror - the author describes the effects of machine guns and high explosives in complete detail.

The book is neither anti-war nor pro-war; it's more matter of fact than that. None of who live today can really imagine what life was like for the trench soldiers of that war, but this book gets you as close to understanding as is possible. If casual discussion of carnage bothers you, don't read this book - but I came away from it with a better idea of what my grandfather went through with the AEF.