Ellen Klages (www.ellenklages.com) is the author of three acclaimed MG historical novels: The Green Glass Sea, which won the Scott O’Dell Award and the New Mexico Book Award; White Sands, Red Menace, which won the California and New Mexico Book awards; and Out of Left Field, which won the Children’s History Book Prize and the Ohioana Book Award. Her adult novel, a historical fantasy, Passing Strange, won the World Fantasy and British Fantasy awards in 2018. Her short fiction has been translated into a dozen languages and been nominated for or won multiple Hugo, Nebula, Locus, Mythopoeic, and World Fantasy awards. “Time Gypsy” was her first published story. Ellen lives in San Francisco, in a small house full of strange and wondrous things.

Adam Roberts was born in London two thirds of the way through the last century. He currently lives a little way west of London and teaches English and Creative Writing at Royal Holloway, University of London. He is the author of sixteen SF novels, including New Model Army (Gollancz, 2010), Jack Glass (2012)-winner of the BSFA and Campbell awards-and Bete (2014). His most recent novel is The Thing Itself (2015). He is also the author of various works of literary criticism and review, including the recently expanded and updated History of Science Fiction (Palgrave, 2016)