Martin Handford spent much of his childhood drawing - his earliest influences were cinema epics and playing with toy soldiers. At art college he says he drew "busy and militarily correct battle scenes" which led to his job as a freelance illustrator specialising in drawing crowd scenes. Each picture in his Where's Wally? books takes Martin months to draw. "As I work my way through a picture, I add Wally when I come to what I feel is a good place to hide him," he explains.