Based on sales for the week ending December 18, 2011

16. Started Early, Took My Dog
Kate Atkinson, Reagan Arthur, $14.99, 9780316066747

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

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

19. The Lake of Dreams
Kim Edwards, Penguin, $16, 9780143120360

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

21. Water for Elephants
Sara Gruen, Algonquin, $14.95, 9781616200701

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

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

24. The Best American Nonrequired Reading
Dave Eggers (Ed.), Mariner, $14.95, 9780547577432

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

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

27. Matterhorn
Karl Marlantes, Grove Press, $15.95, 9780802145314

28. Fall of Giants
Ken Follett, NAL, $25, 9780451232571

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

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

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

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

33. The Sherlockian
Graham Moore, Twelve, $14.99, 9780446572583

34. Tinker, Tailor, Soldier, Spy
John Le Carre, Penguin, $16, 9780143120933

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

36. A Christmas Blizzard
Garrison Keillor, Penguin, $13, 9780143119883

37. The Best American Mystery Stories 2011
Harlan Coben (Ed.), Mariner, $14.95, 9780547553962

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

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

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

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

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

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

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

45. The Tower, the Zoo, and the Tortoise
Julia Stuart, Anchor, $14.95, 9780307476913

46. The Next Always
Nora Roberts, Berkley, $16, 9780425243213

47. People of the Book
Geraldine Brooks, Penguin, $15, 9780143115007

48. Faithful Place
Tana French, Penguin, $16, 9780143119494

49. The Magicians
Lev Grossman, Plume, $16, 9780452296299

50. By Nightfall
Michael Cunningham, Picador, $15, 9780312610432