Based on sales for the week ending January 1, 2012

16. Jack Kennedy
Chris Matthews, S&S, $27.50, 9781451635089

17. Rin Tin Tin
Susan Orlean, S&S, $26.99, 9781439190135

18. Plenty
Yotam Ottolenghi, Chronicle, $35, 9781452101248

19. Food Rules
Michael Pollan, Maira Kalman (Illus.), Penguin Press, $23.95, 9781594203084

20. Back to Work
Bill Clinton, Knopf, $23.95, 9780307959751

21. That Used to Be Us
Thomas L. Friedman, Michael Mandelbaum, FSG, $28, 9780374288907

22. Arguably
Christopher Hitchens, Twelve, $30, 9781455502776

23. The Time of Our Lives
Tom Brokaw, Random House, $26, 9781400064588

24. Rome
Robert Hughes, Knopf, $35, 9780307268440

25. Jerusalem: The Biography
Simon Sebag Montefiore, Knopf, $35, 9780307266514

26. Bossypants
Tina Fey, Reagan Arthur, $26.99, 9780316056861

27. The Cook's Illustrated Cookbook
Cook's Illustrated Magazine (Ed.), Cook's Illustrated, $40, 9781933615899

28. Into the Silence
Wade Davis, Knopf, $32.50, 9780375408892

29. Through My Eyes
Tim Tebow, Harper, $26.99, 9780062007285

30. The Greater Journey
David McCullough, S&S, $37.50, 9781416571766

31. Destiny of the Republic
Candice Millard, Doubleday, $28.95, 9780385526265

32. The Eighty-Dollar Champion
Elizabeth Letts, Ballantine, $26, 9780345521088

33. Hedy's Folly
Richard Rhodes, Doubleday, $26.95, 9780385534383

34. Pilgrimage
Annie Leibovitz, Random House, $50, 9780375505089

35. Hemingway's Boat
Paul Hendrickson, Knopf, $30, 9781400041626

36. Spontaneous Happiness
Andrew Weil, Little Brown, $27.99, 9780316129442

37. Just My Type
Simon Garfield, Gotham, $27.50, 9781592406524

38. Civilization: The West and the Rest
Niall Ferguson, Penguin Press, $35, 9781594203053

39. 1493
Charles C. Mann, Knopf, $30.50, 9780307265722

40. Why Read Moby-Dick?
Nathaniel Philbrick, Viking, $25, 9780670022991

41. The Family Meal
Ferran Adria, Phaidon, $29.95, 9780714862538

42. Seriously... I'm Kidding
Ellen DeGeneres, Grand Central, $26.99, 9780446585026

43. And So It Goes
Charles J. Shields, Henry Holt, $30, 9780805086935

44. Gabby
Gabrielle Giffords, Mark Kelly, Scribner, $26.99, 9781451661064

45. Following Atticus
Tom Ryan, Morrow, $25.99, 9780061997105

46. Jacqueline Kennedy
Caroline Kennedy, Michael Beschloss, Hyperion, $60, 9781401324254

47. The New New Rules
Bill Maher, Blue Rider, $26.95, 9780399158414

48. A Train in Winter
Caroline Moorehead, Harper, $27.99, 9780061650703

49. Midnight Rising
Tony Horwitz, Henry Holt, $29, 9780805091533

50. Pacific Crucible
Ian W. Toll, Norton, $35, 9780393068139