The Spirit is a fictional masked crimefighter created by cartoonist Will Eisner. He first appeared June 2, 1940 as the main feature of a 16-page, tabloid-sized, newsprint comic book insert distributed in the Sunday edition of Register and Tribune Syndicate newspapers; it was ultimately carried by 20 Sunday newspapers, with a combined circulation of five million copies during the 1940s. "The Spirit Section", as the insert was popularly known, continued until October 5, 1952. It generally included two other, four-page strips (initially Mr. Mystic and Lady Luck), plus filler material. Eisner was the editor, but also wrote and drew most entries—after the first few months, he had the uncredited assistance of writer Jules Feiffer and artists Jack Cole and Wally Wood, though Eisner's singular vision for the character was a unifying factor.