 Years with smaller numbers means one or more titles dominated as major best sellers, notably "The Da Vinci Code" in 2003 and 2004, "Fifty Shades of Grey" in 2012 and "Where the Crawdads Sing" in 2019.The list is compiled by the editors of the "News Surveys" department, not by "The New York Times Book Review" department, where it is published.It is based on weekly sales reports obtained from selected samples of independent and chain bookstores and wholesalers throughout the United States.