Tomas Tranströmer -- the recipient of the 2011 Nobel Prize in Literature -- can be clearly recognized not just as Sweden's most important poet, but as a writer of international stature whose work speaks to us now with undiminished clarity and resonance. Long celebrated as a master of the arresting, suggestive image, Tranströmer is a poet of the liminal: his verse is drawn again and again to thresholds of light and of water, the boundaries between man and nature, wakefulness a