Neil Gaiman's Sandman: Endless Nights debuted at number twenty on the New York Times Best Sellers List For Hardcover Fiction.  This marks the first time a book published by an American comic book publisher has earned a spot on New York Times'  list.  The strong debut of Gaiman's latest Sandman graphic novel is the result of a successful multi-media publicity campaign that was all DC promised and more. The question now becomes. 'Will Sandman: Endless Nights have 'legs' -- will word of mouth lead to a steady growth in sales that will last through the coming holiday season?'