By Arlice Davenport From The Wichita Eagle Derek Walcott remains a true literary treasure. “The Poetry of Derek Walcott 1948-2013” by Derek Walcott, selected by Glyn Maxwell (Farrar, Straus, Giroux, 617 pages, $35) Just as the sea surges relentlessly against the shores of his native St. Lucia, so Derek Walcott has forged an oceanic career […]