WILLIAM CAMPBELL POWELL was born in Sheffield, England, and grew up in and around Birmingham, the “second city” of England. He attended King Edward’s School in Birmingham and won a scholarship to Clare College, Cambridge, where initially he studied Natural Sciences and subsequently majored in Computer Science. He now lives in High Wycombe, Buckinghamshire, with his wife, Avis, and his two teenage sons. Expiration Day, a science fiction story for teens, is his first novel.