Martin Knight is the author of several books including collaborations with footballers George Best, Peter Osgood and Dave Mackay. He is co-author of terrace culture classic Hoolifan as well as accounts of a bare-knuckle fighter and international drug smuggler. Novels include Common People and Battersea Girl. In 2009 Gypsy Joe was selected as The Observer Sports Book of the Year. He lives in Surrey and Norfolk.