Based on sales for the week ending March 10, 2012

16. Room
Emma Donoghue, Back Bay, $14.99, 9780316098328

17. The Girl With the Dragon Tattoo
Stieg Larsson, Vintage, $15.95, 9780307949493

18. Tinker Tailor Soldier Spy
John le Carré, Penguin, $16, 9780143120933

19. Dreams of Joy
Lisa See, Random House, $15, 9780812980547

20. Major Pettigrew's Last Stand
Helen Simonson, Random House, $15, 9780812981223

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

22. Before I Go to Sleep
S.J. Watson, Harper, $14.99, 9780062060563

23. The Great Gatsby
F.Scott Fitzgerald, Scribner, $15, 9780743273565

24. When the Killing's Done
T.C. Boyle, Penguin, $16, 9780143120391

25. The Story of Beautiful Girl
Rachel Simon, Grand Central, $12, 9780446574457

26. Sarah's Key
Tatiana De Rosnay, St. Martin's, $13.99, 9781250004345

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

28. Fifty Shades of Grey
E.L. James, Writer's Coffee Shop, $29.99, 9781612130286

29. Hotel on the Corner of Bitter and Sweet
Jamie Ford, Ballantine, $15, 9780345505347

30. A Dog's Purpose
W.Bruce Cameron, Forge, $12.99, 9780765330345

31. The Wise Man's Fear
Patrick Rothfuss, DAW, $19, 9780756407124

32. An Object of Beauty
Steve Martin, Grand Central, $14.99, 9780446573658

33. The Imperfectionists
Tom Rachman, Dial, $15, 9780385343671

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

35. Ten Thousand Saints
Eleanor Henderson, Ecco Press, $15.99, 9780062021212

36. This Beautiful Life
Helen Schulman, Harper Perennial, $13.99, 9780062024398

37. A Secret Kept
Tatiana De Rosnay, St. Martin's, $14.99, 9780312553494

38. Emily, Alone
Stewart O'Nan, Penguin, $15, 9780143120490

39. Tinkers
Paul Harding, Bellevue Literary Press, $14.95, 9781934137123

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

41. The Postmistress
Sarah Blake, Berkley, $15, 9780425238691

42. The Descendants
Kaui Hart Hemmings, Random House, $15, 9780812982954

43. Abraham Lincoln: Vampire Hunter
Seth Grahame-Smith, Grand Central, $13.99, 9780446563079

44. Sister
Rosamund Lupton, Broadway Books, $14, 9780307716521

45. West of Here
Jonathan Evison, Algonquin, $15.95, 9781616200824

46. Half Broke Horses
Jeannette Walls, Scribner, $16, 9781416586296

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

48. Freedom
Jonathan Franzen, Picador, $16, 9780312576462

49. Sisterhood Everlasting
Ann Brashares, Random House, $12, 9780385521239

50. Shantaram
Gregory David Roberts, St. Martin's, $14.99, 9780312330538