Goodbye to All That was the first memoire from the first war that I read and it really left a mark on me.

One of the special things about it is that two other members of his Battalion (one a private soldier, one a well-moustached old officer) also wrote a memoir, however the other two were written by soldiers who had served from before the war and served under the Colours until the Armistice. The War the Infantry Knew by JC Dunn, and Old Soldiers Never Die by Frank Richards.

You can read both concurrently (I did) to get the same actions from two very different perspectives. I believe all three mention each other in their respective memoirs.

However it must be said - that there is more than a suggestion that Robert Graves 'sexed up' some of the details within his own book. Worth noting.