I'll nominate
All Quiet On The Western Front by Erich Maria Remarque. This is arguably the greatest Anti-war novel ever written. Told from the perspective of a German soldier, one soon becomes part of the universal human tragedy that caught up all those whatever their nationality. The book is a powerful and moving cry that is relevant yet.
From Wikipedia:
"
All Quiet on the Western Front (German:
Im Westen nichts Neues) is a novel by Erich Maria Remarque, a German veteran of World War I. The book describes the German soldiers' extreme physical and mental stress during the war, and the detachment from civilian life felt by many of these soldiers upon returning home from the front.
The novel was first published in November and December 1928 in the German newspaper
Vossische Zeitung and in book form in late January 1929. The book and its sequel, The Road Back, were among the books banned and burned in Nazi Germany. It sold 2.5 million copies in 22 languages in its first eighteen months in print."
Kindle editions are available at Amazon UK:
http://www.amazon.co.uk/Quiet-Wester...+Western+Front
and Amazon.com
http://www.amazon.com/Quiet-Western-...+Western+Front
Epub versions are available through Kobo, Feedbooks, and the iTunes book store.