I don't know if anyone has read the book, (I believe there is now a London Theatre production) War Horse by Michael Morpurgo "an incredibly moving story about one horse's experience in the deadly chaos of the first world war. In 1914, Joey, a young farm horse, is sold to the army and thrust into the midst of the war on the Western Front. With his officer, he charges towards the enemy, witnessing the horror of the front-line. But even in the desolation of the trenches, Joey's courage touches the soldiers around him"
It is classed as a children's book but I am sure some of you would enjoy it.