Stephen Baxter, author of the space duology featuring Proxima and Ultima, is the national bestselling author of Ark and Flood. He is a winner of the British Science Fiction Award and the Locus Award. His novel Voyage won the Sidewise Award for the best alternate history novel of the year, and he won the Philip K. Dick Award twice, for The Time Ships and for Vacuum Diagrams. He was also a recipient of the John W. Campbell Award for The Time Ships.