Martin, Stan and Jan Berenstein, Richard Scarry, Gilbert Patten or Norman Bridwell (from 400 to 80 titles each) average just 2 million units per title. http://deadmoney.net/__media__/js/netsoltrademark.php?d=topnj.Co.kr%2Fbbs%2Fboard.php%3Fbo_table%3Dfree%26wr_id%3D389013