Each week about fifty New Yorker cartoonists submit ten ideas, yielding five hundred cartoons for no more than twenty spots in the magazine. Arguably the most brilliant single-panel-gag cartoonists in the world create a bunch of cartoons every week that never see the light of day. These rejects were piling up in the dusty corners of studios all over the country. Sam Gross, who has been contributing since 1962, has more than 12,000 rejected...