Liane Moriarty's The Husband's Secret climbed from the eighth bestselling book on Apple's iBooks bestseller chart to #1 for the week ended October 21. Published on July 30, Moriarty's novel bested last week's top seller, the much-anticipated next book from Rick Riordan, The House of Hades, which landed at #5.

The first book in E.L. James' trilogy, 50 Shades of Grey, squeezed onto the top 20 for the week ended October 16, coming in at #17, but last week reached the #2 spot. There has been significant coverage of the casting saga for the film adaptation of the book, which may have boosted sales once again. A forthcoming movie based on Orson Scott Card's Ender's Game, slated for a November 1 release, pushed the novel from the #5 to the #4 slot last week. Veronica Roth's Allegiant, the final installment of her Divergent trilogy, landed at #9.

Top Paid Books

1. The Husband's Secret by Liane Moriarty (Penguin Group US)

2. Fifty Shades of Grey by E L James (Knopf Doubleday Publishing Group)

3. Between Sisters by Kristin Hannah (Random House Publishing Group)

4. Ender's Game by Orson Scott Card (Tom Doherty Associates)

5. The Heroes of Olympus, Book Four: The House of Hades by Rick Riordan (Disney Publishing Worldwide)

6. Killing Jesus by Bill O'Reilly & Martin Dugard (Henry Holt and Co.)

7. Bridget Jones: Mad About the Boy by Helen Fielding (Knopf Doubleday Publishing Group)

8. The Longest Ride by Nicholas Sparks (Grand Central Publishing)

9. Allegiant by Veronica Roth (Katherine Tegen Books)

10. Storm Front by John Sandford (Penguin Group US)

11. Doctor Sleep by Stephen King (Scribner)

12. Identical by Scott Turow (Grand Central Publishing)

13. Johnny Carson by Henry Bushkin (Houghton Mifflin Harcourt)

14. Gone by James Patterson & Michael Ledwidge (Little, Brown and Company)

15. David and Goliath by Malcolm Gladwell (Little, Brown and Company)

16. The Fault in Our Stars by John Green (Penguin Group US)

17. Gone Girl by Gillian Flynn (Crown Publishing Group)

18. The Book Thief by Markus Zusak (Random House Children's Books)

19. My Story by Elizabeth Smart & Chris Stewart (St. Martin's Press)

20. Twelve Years a Slave by Solomon Northup (Atria / 37 Ink)