The top 10 books on Apple's iTunes Store

1. "Entwined with You," by Sylvia Day (Penguin Group US)

2. "Inferno," by Dan Brown (Knopf Doubleday Publishing Group)

3. "And the Mountains Echoed," by Khaled Hosseini (Penguin Group US)

4. "Revenge Wears Prada," by Lauren Weisberger (Simon & Schuster)

5. "The Great Gatsby," by F. Scott Fitzgerald (Scribner)

6. "Forever You (Forever Trilogy, (hash)2)," by Sandi Lynn (Sandi Lynn)

7. "The Hit," by David Baldacci (Grand Central Publishing)

8. "World War Z," by Max Brooks (Crown Publishing Group)

9. "Ladies' Night," by Mary Kay Andrews (St. Martin's Press)

10. "Gone Girl," by Gillian Flynn (Crown Publishing Group)