Based on sales for the week ending January 8, 2012

16. Then Again
Diane Keaton, Random House, $26, 9781400068784

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

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

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

20. Guinness World Records 2012
Guinness, $28.95, 9781904994671

21. American Sniper
Chris Kyle, et al., Morrow, $26.99, 9780062082350

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

23. An Everlasting Meal
Tamar Adler, Scribner, $25, 9781439181874

24. The Dukan Diet
Pierre Dukan, Crown Archetype, $26, 9780307887962

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

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

27. Rome: A Cultural, Visual, and Personal History
Robert Hughes, Knopf, $35, 9780307268440

28. The Cook's Illustrated Cookbook
Cook's Illustrated, $40, 9781933615899

29. Woolgathering
Patti Smith, New Directions, $18.95, 9780811219440

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

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

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

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

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

35. Taking People With You
David Novak, Portfolio, $25.95, 9781591844549

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

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

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

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

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

41. Distrust That Particular Flavor
William Gibson, Putnam Adult, $26.95, 9780399158438

42. Real Marriage
Mark Driscoll, Grace Driscoll, Thomas Nelson, $22.99, 9781400203833

43. 1493
Charles C. Mann, Knopf, $30.50, 9780307265722

44. The Journal of Best Practices
David Finch, Scribner, $25, 9781439189719

45. Jesus Calling
Sarah Young, Integrity, $15.99, 9781591451884

46. Civilization
Niall Ferguson, Penguin Press, $35, 9781594203053

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

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

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

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