Off to Be the Wizard (Magic 2.0, Band 1)

A Cant Miss Science Fiction and Fantasy title in March 2014. Martin Banks is just a normal guy who has made an abnormal discovery he can manipulate reality, thanks to reality being nothing more than a computer program. With every use of this ability, though, Martin finds his little tweaks have not escaped notice. Rather than face prosecution, he decides instead to travel back in time to the Middle Ages and pose as a wizard. What could possibly go wrong? An American hacker in King Arthurs court, Martin must now train to become a full-fledged master of his powers, discover the truth behind the ancient wizard Merlinand not, yknow, die or anything.