Based on sales for the week ending April 7, 2013

16. The Night Circus
Erin Morgenstern, Anchor, $15, 9780307744432

17. Rules of Civility
Amor Towles, Penguin, $16, 9780143121169

18. Canada
Richard Ford, Ecco Press, $15.99, 9780061692031

19. Wool
Hugh Howey, S&S, $15, 9781476733951

20. The Yard
Alex Grecian, Berkley , $16, 9780425261279

21. Things Fall Apart
Chinua Achebe, Anchor, $11.95, 9780385474542

22. State of Wonder
Ann Patchett, Harper Perennial, $15.99, 9780062049810

23. The Snow Child
Eowyn Ivey, Reagan Arthur/Back Bay Books, $14.99, 9780316175661

24. Last Friends
Jane Gardam, Europa Editions, $16, 9781609450939

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

26. The Forgotten
David Baldacci, Grand Central , $14.99, 9781455523153

27. The Expats
Chris Pavone, Broadway, $15, 9780770435721

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

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

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

31. Calico Joe
John Grisham, Bantam, $14, 9780345536648

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

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

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

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

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

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

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

39. Orphan Train
Christina Baker Kline, Morrow, $14.99, 9780061950728

40. The Brief Wondrous Life of Oscar Wao
Junot Diaz, Riverhead, $16, 9781594483295

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

42. What We Talk About When We Talk About Anne Frank
Nathan Englander, Vintage, $15, 9780307949608

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

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

45. 1Q84
Haruki Murakami, Vintage, $16.95, 9780307476463

46. A Game of Thrones
George R.R. Martin, Bantam, $18, 9780553386790

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

48. City of Thieves
David Benioff, Plume, $16, 9780452295292

49. Walking Disaster
Jamie McGuire, Atria , $15, 9781476712987

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