For more than 30 years, Sidney Sheldon has been a regular on bestseller lists worldwide. His 17 novels have sold more than 300 million copies and have been published in 51 languages in 180 countries. There is not enough space in this column to mention all his other accomplishments in television, movies and theater. His latest book hit, Are You Afraid of the Dark?, has been on the charts for four weeks and Morrow is up to 500,000 copies in print.