Based on sales for the week ending September 4, 2011

16. Ready Player One
Ernest Cline, Crown, $24, 9780307887436

17. Kill Me If You Can
James Patterson, Marshall Karp, Little Brown, $27.99, 9780316097543

18. Portrait of a Spy
Daniel Silva, Harper, $26.99, 9780062072184

19. The Tiger's Wife
Tea Obreht, Random House, $25, 9780385343831

20. The Last Werewolf
Glen Duncan, Knopf, $25.95, 9780307595089

21. The Cut
George Pelecanos, Reagan Arthur, $25.99, 9780316078429

22. Only Time Will Tell
Jeffrey Archer, St. Martin's, $27.99, 9780312539559

23. Train Dreams
Denis Johnson, FSG, $18, 9780374281144

24. The Submission
Amy Waldman, FSG, $26, 9780374271565

25. The Family Fang
Kevin Wilson, Ecco, $23.99, 9780061579035

26. Flash and Bones
Kathy Reichs, Scribner, $26.99, 9781439102411

27. House of Holes
Nicholson Baker, S&S, $25, 9781439189511

28. Turn of Mind
Alice LaPlante, Atlantic Monthly, $24, 9780802119773

29. Ghost Story
Jim Butcher, Roc, $27.95, 9780451463791

30. Cold Vengeance
Douglas Preston, Lincoln Child, Grand Central, $26.99, 9780446554985

31. The Most Dangerous Thing
Laura Lippman, Morrow, $25.99, 9780061706516

32. Before I Go to Sleep
S.J. Watson, Harper, $25.99, 9780062060556

33. The Snowman
Jo Nesbø, Knopf, $25.95, 9780307595867

34. The Omen Machine
Terry Goodkind, Tor, $29.99, 9780765327727

35. Girls in White Dresses
Jennifer Close, Knopf, $24.95, 9780307596857

36. The Measure of the Magic
Terry Brooks, Del Rey, $27, 9780345484208

37. The Hypnotist
Lars Kepler, Sarah Crichton Books/FSG, $27, 9780374173951

38. This Beautiful Life
Helen Schulman, Harper, $24.99, 9780062024381

39. Iron House
John Hart, Thomas Dunne, $25.99, 9780312380342

40. The Help
Kathryn Stockett, Amy Einhorn Books/Putnam, $24.95, 9780399155345

41. Freedom
Jonathan Franzen, FSG, $28, 9780374158460

42. Full Black
Brad Thor, Atria, $26.99, 9781416586616

43. The Sookie Stackhouse Companion
Charlaine Harris (Ed.), Ace, $30, 9780441019717

44. Conquistadora
Esmeralda Santiago, Knopf, $27.50, 9780307268327

45. A Bitter Truth
Charles Todd, Morrow, $24.99, 9780062015709

46. Victory and Honor
W.E.B. Griffin, William E. Butterworth, IV, Putnam Adult, $26.95, 9780399157554

47. Once Upon a River
Bonnie Jo Campbell, Norton, $25.95, 9780393079890

48. Smokin' Seventeen
Janet Evanovich, Bantam, $28, 9780345527684

49. Back of Beyond
C.J. Box, Minotaur, $25.99, 9780312365745

50. Northwest Angle
William Kent Krueger, Atria, $24.99, 9781439153956