RegenerationRegeneration is the Booker Prize nominated first book in Pat Barker's award winning World War One trilogy. Craiglockhart War Hospital, Scotland, 1917, where army psychiatrist William Rivers is treating shell shocked soldiers. Under his care are the poets Siegfried Sassoon and Wilfred Owen, as well as mute Billy Prior, who is only able to communicate by means of pencil and paper. Rivers's job is to make the men in his charge healthy enough to fight.