Mark Waid is an American comic book writer. He is well known for his eight-year run as writer of the DC Comics' title The Flash, as well as his scripting of the limited series Kingdom Come and Superman: Birthright, and his work on Marvel Comics' Captain America. From August 2007 to December 2010, Waid served as Editor-in-Chief, and later, Chief Creative Officer of BOOM! Studios, where he wrote titles such as Irredeemable, Incorruptible and The Traveler.