Martin Handford gathers his inspiration from a huge variety of sources: films, visiting museums and art galleries, reading comics and books, and collecting ephemera and trivia. He is fascinated by crowds, and is attracted to their vibes, patterns and details especially humour. He is constantly on the look-out for puns and wordplay that can be used in his pictures. Each picture 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.