Gregory Frost is an American author of science fiction and fantasy, including the Shadowbridge series, Fitcher’s Brides, the Philip K. Dick-ian science fiction novel The Pure Cold Light, as well as two novels derived from the Celtic epic the táin bó cuailnge. His short fiction has appeared in many anthologies and magazines and includes a Best Novelette winner of Asimov’s Science Fiction’s Readers’ Award, “Lock Up Your Chickens and Daughters, H’ard and Andy Are Come to Town,” collaboratively written with Michael Swanwick. He taught the fiction writing workshop at Swarthmore College in Swarthmore, Pennsylvania, for eighteen years.