Based on sales for the week ending April 22, 2012

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

31. Please Look After Mom
Kyung-Sook Shin, Vintage, $14.95, 9780307739513

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

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

34. The Lady of the Rivers
Philippa Gregory, Touchstone Books, $16, 9781416563716

35. Extremely Loud and Incredibly Close
Jonathan Safran Foer, Mariner, $14.95, 9780547735023

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

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

38. Elizabeth I
Margaret George, Penguin, $17, 9780143120445

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

40. The Lucky One
Nicholas Sparks, Grand Central, $14.99, 9781455508969

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

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

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

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

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

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

47. Pirate King
Laurie R. King, Bantam, $15, 9780553386752

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

49. The Things They Carried
Tim O'Brien, Mariner, $14.95, 9780618706419

50. The Love of My Youth
Mary Gordon, Anchor, $15, 9780307390325