Based on sales for the week ending April 29, 2012

16. The Troubled Man
Henning Mankell, Vintage, $15, 9780307477408

17. The American Heiress
Daisy Goodwin, St. Martin's Griffin, $14.99, 9780312658663

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

19. The Girl Who Kicked the Hornet's Nest
Stieg Larsson, Vintage, $15.95, 9780307454560

20. Salvage the Bones
Jesmyn Ward, Bloomsbury, $15, 9781608196265

21. A Visit From the Goon Squad
Jennifer Egan, Anchor, $14.95, 9780307477477

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

23. Drawing Conclusions
Donna Leon, Penguin, $15, 9780143120643

24. The Help
Kathryn Stockett, Berkley, $16, 9780425245132

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

26. The Pale King
David Foster Wallace, Back Bay, $16.99, 9780316074223

27. Clara and Mr. Tiffany
Susan Vreeland, Random House, $15, 9780812980189

28. The Saturday Big Tent Wedding Party
Alexander McCall Smith, Anchor, $14.95, 9780307472984

29. Doc
Mary Doria Russell, Ballantine, $15, 9780812980004

30. A Game of Thrones
George R.R. Martin, Bantam, $17, 9780553386790

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

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

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

34. 22 Britannia Road
Amanda Hodgkinson, Penguin, $16, 9780143121046

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

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

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

38. A Discovery of Witches
Deborah Harkness, Penguin, $16, 9780143119685

39. A Lesson in Secrets
Jacqueline Winspear, Harper Perennial, $14.99, 9780061727719

40. Turn of Mind
Alice LaPlante, Grove Press, $15, 9780802145901

41. Robopocalypse
Daniel Wilson, Vintage, $15.95, 9780307740809

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

43. Mr. Churchill's Secretary
Susan Elia MacNeal, Bantam, $15, 9780553593617

44. Little Bee
Chris Cleave, S&S, $15, 9781416589648

45. What Alice Forgot
Liane Moriarty, Berkley, $15, 9780425247440

46. Zero Day
David Baldacci, Grand Central, $14.99, 9781455518999

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

48. Now You See Her
James Patterson, Michael Ledwidge, Grand Central, $14.99, 9780446574709

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

50. The Night Strangers
Chris Bohjalian, Broadway, $15, 9780307395009