Based on sales for the week ending March 20, 2011

16. The Double Comfort Safari Club
Alexander McCall Smith, Anchor, $14, 9780307277480

17. Let the Great World Spin
Colum McCann, Random House, $15, 9780812973990

18. The Girl With the Dragon Tattoo
Stieg Larsson, Vintage, $14.95, 9780307454546

19. True Grit
Charles Portis, Overlook, $14.95, 9781590204597

20. Lord of Misrule
Jaimy Gordon, Vintage, $15, 9780307946737

21. The Girl Who Played With Fire
Stieg Larsson, Vintage, $15.95, 9780307454553

22. The Invisible Bridge
Julie Orringer, Vintage, $15.95, 9781400034376

23. The Sweetness at the Bottom of the Pie
Alan Bradley, Bantam, $15, 9780385343497

24. The Lacuna
Barbara Kingsolver, Harper Perennial, $16.99, 9780060852580

25. Sarah's Key
Tatiana De Rosnay, St. Martin's, $13.95, 9780312370848

26. The Forgotten Garden
Kate Morton, Washington Square Press, $15, 9781416550556

27. Angelology
Danielle Trussoni, Penguin, $16, 9780143118466

28. Heart of the Matter
Emily Giffin, St. Martin's, $14.99, 9780312554170

29. The Mapping of Love and Death
Jacqueline Winspear, Harper Perennial, $14.99, 9780061727689

30. The Finkler Question
Howard Jacobson, Bloomsbury, $15, 9781608196111

31. Parrot and Olivier in America
Peter Carey, Vintage, $15.95, 9780307476012

32. Never Let Me Go
Kazuo Ishiguro, Vintage, $15, 9780307740991

33. The Elegance of the Hedgehog
Muriel Barbery, Europa Editions, $15, 9781933372600

34. The Windup Girl
Paolo Bacigalupi, Night Shade, $14.95, 9781597801584

35. The Lotus Eaters
Tatjana Soli, St. Martin's, $14.99, 9780312674441

36. The Weed That Strings the Hangman's Bag
Alan Bradley, Bantam, $15, 9780385343459

37. Noah's Compass
Anne Tyler, Ballantine, $15, 9780345516596

38. Wingshooters
Nina Revoyr, Akashic, $15.95, 9781936070718

39. Winter Garden
Kristin Hannah, St. Martin's, $14.99, 9780312663155

40. A Reliable Wife
Robert Goolrick, Algonquin, $14.95, 9781565129771

41. The Guernsey Literary and Potato Peel Pie Society
Mary Ann Shaffer, Annie Barrows, Dial, $15, 9780385341004

42. Remarkable Creatures
Tracy Chevalier, Plume, $15, 9780452296725

43. The Great Gatsby
F. Scott Fitzgerald, Scribner, $14, 9780743273565

44. The Surrendered
Chang-Rae Lee, Riverhead, $16, 9781594485015

45. City of Thieves
David Benioff, Plume, $15, 9780452295292

46. Ask
Sam Lipsyte, Picador, $15, 9780312680633

47. Still Alice
Lisa Genova, Pocket, $15, 9781439102817

48. A Gate at the Stairs
Lorrie Moore, Vintage, $15, 9780375708466

49. A Novel Bookstore
Laurence Cosse, Europa Editions, $15, 9781933372822

50. So Much for That
Lionel Shriver, Harper Perennial, $14.99, 9780061458590