Kathryn Cramer coedited the World Fantasy Award-winning anthology The Architecture of Fear and was the editor of its widely praised sequel Walls of Fear. She has edited and coedited several other anthologies. With David G. Hartwell, she edited The Ascent of Wonder, a major anthology covering the earlier history and development of "hard SF," to which this volume is a companion. Hartwell and Cramer also coedit the annual Year's Best Fantasy and Year's Best SF series. They live in Pleasantville, NY, with their son, Peter.