The New York Times Best Seller List is widely considered to be the preeminent list of best-selling books in the United States. A bestseller is a Book that is identified as extremely popular by its inclusion on lists of currently top selling titles that are based on publishing industry and book trade The United States of America —commonly referred to as the  It is published weekly in the The New York Times Book Review magazine, which is usually found inserted in the Sunday edition of The New York Times, or as a stand-alone subscription. The New York Times Book Review is a weekly paper-magazine supplement to The New York Times in which current non-fiction and fiction books are reviewed The best-seller list has been ongoing since April 9, 1942. Events 193 - Septimius Severus is proclaimed Roman Emperor by the army in Illyricum (in the Balkans) Year 1942 ( MCMXLII) was a Common year starting on Thursday (the link will display the full 1942 calendar of the Gregorian calendar.
The list is created by the editors of the "News Surveys" department, and not by The New York Times Book Review department, where it is published.
The list is based on weekly sales reports obtained from selected samples of independent and chain bookstores, as well as wholesalers, throughout the United States. The sales figures are widely believed to represent books that have actually been sold at retail, rather than wholesale figures, as the Times surveys a number of actual booksellers in an attempt to better reflect what is actually purchased by individual buyers. Some books are flagged with a dagger (†) indicating that a significant number of bulk orders had been received by retail bookstores. A dagger ( †, &dagger U+ 2020 is a typographical symbol or Glyph.
The exact methodology used in creating the list is classified as a trade secret.  As of 1992, according to Edwin Diamond in his book Behind the Times, the survey encompasses over 3,000 bookstores as well as "representative wholesalers with more than 28,000 other retail outlets, including variety stores and supermarkets. "
The list is divided into fiction and non-fiction sections, with each containing ten to twenty titles. Fiction is the telling of stories which are not real More specifically fiction is an imaginative form of Narrative, one of the four basic Rhetorical modes. Non-fiction is an account or representation of a subject which is presented as Fact. Expanded lists showing additional titles are available online through the Book Review website. In early 1984 the "Advice, How-to and Miscellaneous" list was created because advice best-sellers were crowding out the general non-fiction list.  In July 2000 a children's literature section was created; some publishers complained that the Harry Potter series wouldn't leave the top spots on the list and was not leaving enough room for their books. 2000 ( MM) was a Leap year that started on Saturday of the Common Era, in accordance with the Gregorian calendar. Children's literature is an age category of literature written for published for or marketed to Children roughly through age 12 Harry Potter is a series of seven Fantasy novels written by British author J  Starting with the September 23 2007 issue, the paperback fiction list was divided into two lists, "Trade Fiction" and "Mass-Market Fiction", because "it gives more emphasis on the literary novels and short-story collections reviewed so often in our pages". Paperback, softback, or softcover describe and refer to a Book by the nature of its binding. Paperback, softback, or softcover describe and refer to a Book by the nature of its binding. 
According to Alan T. Sorensen of Stanford Business School, who studied sales of hardcover fiction, the majority of book buyers use the Times’ list to see what is worth reading. The Stanford Graduate School of Business (also known as Stanford Business School or Stanford GSB) is one of the professional Therefore, according to Sorensen, relatively unknown writers get the biggest benefit from being on the list, while for already best-selling authors such as Danielle Steel or John Grisham, being on the list makes virtually no difference in increasing sales. Danielle Fernande Dominique Schuelein-Steel (born on August 14, 1947 in New York City New York) is an American Romantic novelist