That reminds me of a great book I read a while back - the first in the Regeneration series by Pat Barker; asides from being very much about the study of shell-shock and related mental afflictions, it includes quite a facinating insight into the life of Siegfried Sassoon and the way in which he used his poetry to show his anti-war sentiments. (And influence Wilfred Owen, who apparently hadn't really considered writing war poetry before meeting him.)