WS Merwin may be the most influential American poet of the last half-century - an artist who has transfigured and reinvigorated the vision of poetry for our time. Bloodaxe published his "Selected Poems" in 2007. Now 81, Merwin has produced 'his best book in a decade - and one of the best outright' ("Publishers Weekly"). The nuanced mysteries of light, darkness, presence, and memory are central themes in his latest collection. 'I have only what I remember, '