By JEFFREY A. TRACHTENBERG Last Monday, David Mitchell's eight-year-old novel "Cloud Atlas" was ranked 2,509 on Amazon.com Inc.'s best seller list. On Friday, it was No. 7.The surge of sales was thanks to a trailer for a film version of the novel that debuted on Apple Inc's website Thursday, combined with the power of social media."Almost as soon as the trailer went up, we saw chatter on Twitter Ferragamo handbags and sales on Amazon really jumped," said Jane von Mehren, publisher of trade paperbacks for the Random House Publishing Group, a unit of Bertelsmann AG's Random House Inc. To cash in on the renewed interest, Random House has ordered a new paperback printing of 25,000 copies, to hit stores before a special movie-tie in edition of the book is released in September. Currently, "Cloud Atlas" has 227,000 paperback copies in print in the U.S. It isn't unusual for a movie version of a book to spark fresh interest in an old title, of course. What's uncommon in this case was the speed at which a mere trailer of a film had an impact. The book features a group of related stories that span a wide time frame and involve romance, adventure and a dark vision of the future. It didn't hit the national best seller lists when it originally came out, despite selling more than 100,000 copies, says David Ebershoff, Mr. Mitchell's editor. It jimmy choo handbags did briefly hit the lists in 2010 after another title by the novelist was published. The movie version of "Cloud Atlas" features an all-star cast including Tom Hanks, Hugh Grant, Susan Sarandon and Halle Berry. Released by Time Warner Inc.'s Warner Bros., it is slated to open Oct. 26. To promote the film, the studio unveiled a trailer on Apple's iTunes movie trailers page early Thursday morning. Running nearly six minutes, the trailer features scenes from the movie in a bid to explain the complicated plot. The trailer got picked up by numerous other websites, says Warner Bros., making it difficult to get an accurate count of how many viewers actually saw it. The new printing is a reprint of the paperback original published by Random House Trade Paperbacks, with the exception of a cover line that reads: Soon to be a major motion picture. There is no movie related art. Random House Trade Paperbacks expects to publish at least 100,000 of the movie-tie in edition paperbacks, which will have movie-related cover art plus an original essay by Mr. Mitchell. There will also be an enhanced digital book edition of "Cloud Atlas" that will be slightly more expensive than the 11.99 e-book now on sale and which will feature movie-related Cartier Handbags extras. Write to Jeffrey A. Trachtenberg at jeffrey.trachtenberg@wsj.com A version of this article appeared July 30, 2012, on page B6 in the U.S. edition of The Wall Street Journal, with the headline: Social Media Power a Novel.