Based on sales for the week ending February 26, 2012

16. Elizabeth the Queen
Sally Bedell Smith, Random House, $30, 9781400067893

17. The World of Downton Abbey
Jessica Fellowes, St. Martin's, $29.99, 9781250006349

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

19. Catherine the Great
Robert K. Massie, Random House, $35, 9780679456728

20. Ameritopia
Mark R. Levin, Threshold Editions, $26.99, 9781439173244

21. Boomerang
Michael Lewis, Norton, $25.95, 9780393081817

22. The Swerve
Stephen J. Greenblatt, Norton, $26.95, 9780393064476

23. All There Is
Dave Isay, Penguin Press, $24.95, 9781594203213

24. Full Service
Scotty Bowers, Grove Press, $25, 9780802120076

25. Abundance
Peter Diamandis, Steven Kotler, Free Press, $26.99, 9781451614213

26. Guitar Zero
Gary Marcus, Penguin Press, $25.95, 9781594203176

27. Ali in Wonderland
Ali Wentworth, Harper, $25.99, 9780061998577

28. Below Stairs
Margaret Powell, St. Martin's, $22.99, 9781250005441

29. Londoners
Craig Taylor, Ecco Press, $29.99, 9780062005854

30. Is Everyone Hanging Out Without Me? (And Other Concerns)
Mindy Kaling, Crown Archetype, $25, 9780307886262

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

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

33. The American Way of Eating
Tracie McMillan, Scribner, $25, 9781439171950

34. While America Sleeps
Russ Feingold, Crown, $26, 9780307952523

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

36. Enemies
Tim Weiner, Random House, $30, 9781400067480

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

38. The Obamas
Jodi Kantor, Little Brown, $29.99, 9780316098755

39. The 17 Day Diet
Dr.Mike Moreno, Free Press, $25, 9781451648652

40. Hilarity Ensues
Tucker Max, Blue Heeler Books, $25.99, 9781451669039

41. One Thousand Gifts
Ann Voskamp, Zondervan, $16.99, 9780310321910

42. Strategic Vision
Zbigniew Brzezinski, Basic Books, $26, 9780465029549

43. That Woman
Anne Sebba, St. Martin's, $27.99, 9781250002969

44. Da Vinci's Ghost
Toby Lester, Free Press, $26.99, 9781439189238

45. Roger Williams and the Creation of the American Soul
John M. Barry, Viking, $35, 9780670023059

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

47. Eisenhower in War and Peace
Jean Edward Smith, Random House, $40, 9781400066933

48. Blue Nights
Joan Didion, Knopf, $25, 9780307267672

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

50. The World America Made
Robert Kagan, Knopf, $21, 9780307961310