Tim Powers (1952 — ) is an sf and fantasy author of many novels, mostly secret histories in which he uses actual hirorical events, but provides an alternative fantastic explanation of them. He said, "I made it an ironclad rule that I could not change or disregard any of the recorded facts, nor rearrange any days of the calendar – and then I tried to figure out what momentous but unrecorded fact could explain them all."
As an English Lit major, he met his close friends and sometimes collaborators James Blaylock and K. W. Jeter, (with whome he invented the author William Ashbless), and he still teaches and works as a writer-in-residence.
His first major novel was The Drawing of the Dark, followed by The Anubis Gates, Declare, and a dozen other novels. His On Stranger Tides was the basis of the most recent Pirates of the Carribean movie.
He was Guest of Honor at Renovation the 2011 Worldcon.