Based on sales for the week ending March 9, 2013

16. Cloud Atlas
David Mitchell, Random House, $15, 9780812984415

17. Fifty Shades of Grey
E.L. James, Vintage, $15.95, 9780345803481

18. In One Person
John Irving, S&S, $15.99, 9781451664133

19. The Silver Linings Playbook
Matthew Quick, Sarah Crichton Books, $15, 9780374533571

20. Swamplandia!
Karen Russell, Vintage, $14.95, 9780307276681

21. 1Q84
Haruki Murakami, Vintage, $16.95, 9780307476463

22. The Age of Miracles
Karen Thompson Walker, Random House, $15, 9780812982947

23. Billy Lynn's Long Halftime Walk
Ben Fountain, Ecco, $14.99, 9780060885618

24. The Limpopo Academy of Private Detection
Alexander McCall Smith, Anchor, $14.95, 9780307472991

25. The Starboard Sea
Amber Dermont, St. Martin's Griffin, $14.99, 9781250023438

26. The Dance of the Seagull
Andrea Camilleri, Penguin, $15, 9780143122616

27. Fifty Shades Darker
E.L. James, Vintage, $15.95, 9780345803498

28. The Marriage Plot
Jeffrey Eugenides, Picador, $16, 9781250014764

29. The Art of Fielding
Chad Harbach, Back Bay, $14.99, 9780316126670

30. The 100-Year-Old Man Who Climbed Out the Window and Disappeared
Jonas Jonasson, Hyperion, $15.99, 9781401324643

31. World War Z
Max Brooks, Three Rivers, $14.95, 9780307346612

32. A Land More Kind Than Home
Wiley Cash, Morrow, $14.99, 9780062088239

33. The Lifeboat
Charlotte Rogan, Reagan Arthur, $14.99, 9780316185912

34. The Art of Hearing Heartbeats
Jan-Philipp Sendker, Other Press, $14.95, 9781590514634

35. The Kitchen House
Kathleen Grissom, Touchstone, $16, 9781439153666

36. Fifty Shades Freed
E.L. James, Vintage, $15.95, 9780345803504

37. Dark Places
Gillian Flynn, Three Rivers, $14, 9780307341570

38. The Buddha in the Attic
Julie Otsuka, Anchor, $13.95, 9780307744425

39. A Good American
Alex George, Berkley, $16, 9780425253175

40. The Art of Racing in the Rain
Garth Stein, Harper, $14.99, 9780061537967

41. The Tiger's Wife
T?a Obreht, Random House, $15, 9780385343848

42. The Cat's Table
Michael Ondaatje, Vintage, $15, 9780307744418

43. The Gods of Gotham
Lyndsay Faye, Berkley, $16, 9780425261255

44. What We Talk About When We Talk About Anne Frank: Stories
Nathan Englander, Vintage, $15, 9780307949608

45. The Alchemist
Paulo Coelho, HarperOne, $14.99, 9780061122415

46. Sharp Objects
Gillian Flynn, Three Rivers, $14, 9780307341556

47. Home
Toni Morrison, Vintage, $14, 9780307740915

48. Ready Player One
Ernest Cline, Broadway, $14, 9780307887443

49. How It All Began
Penelope Lively, Penguin, $16, 9780143122647

50. Cutting for Stone
Abraham Verghese, Vintage, $15.95, 9780375714368