Poul Anderson was one of the seminal figures of twentieth-century science fiction. Named a Grand Master by the Science Fiction Writers of America in 1997, he produced an enormous body of standalone novels and series fiction and was equally at home in the fields of heroic fantasy and hard SF. He was a meticulous craftsman and a gifted storyteller, and the impact of his finest work continues, undiminished, to this day. Multiverse: Exploring Poul Andersons Worlds is a rousing, all-original anthology that stands both as a significant achievement in its own right and as a heartfelt tribute to a remarkable writerand equally remarkable man. A nicely balanced mixture of fiction and reminiscence, Multiverse contains more than a dozen stories and novellas by some of todays finest writers, along with moving reflections by, among others, Andersons wife, Karen; his daughter, Astrid Anderson Bear; and his son-in-law, novelist and coeditor Greg Bear. Bears introduction, My Friend Poul, is particularly illuminating and insightful. The fictional contributions comprise a kaleidoscopic array of imaginative responses to Andersons many and varied fictional worlds. A few of the highlights include Nancy Kress Outmoded Things and Terry Brooks The Fey of Cloudmoor, stories inspired by the Hugo Awardwinning The Queen of Air and Darkness; a pair of truly wonderful Time Patrol stories, A Slip in Time by S. M. Stirling and Christmas in Gondwanaland by Robert Silverberg; Raymond E. Feists Dominic Flandry adventure, A Candle; and a pair of very different homages to the classic fantasy novel, Three Hearts and Three Lions: The Man Who Came Late by Harry Turtledove and Three Lilies and Three Leopards (And a Participation Ribbon in Science) by Tad Williams. These stories, together with singular contributions by such significant figures as Larry Niven, Gregory Benford, and Eric Flint, add up to a memorable, highly personal anthology that lives up to the standards set by the lateand indisputably greatPoul Anderson.