Based on sales for the week ending August 21, 2011

16. The Glass Castle
Jeannette Walls, Scribner, $15, 9780743247542

17. The Disappearing Spoon
Sam Kean, Back Bay, $14.99, 9780316051637

18. The Wave
Susan Casey, Anchor, $15.95, 9780767928854

19. Zeitoun
Dave Eggers, Vintage, $15.95, 9780307387943

20. The Big Short
Michael Lewis, Norton, $15.95, 9780393338829

21. Rand McNally Road Atlas 2012
Rand McNally, $13.95, 9780528003363

22. 1491
Charles C. Mann, Vintage, $16.95, 9781400032051

23. Night
Elie Wiesel, FSG, $9.95, 9780374500016

24. Sex at Dawn
Christopher Ryan, Cacilda Jetha, Harper Perennial, $15.99, 9780061707810

25. How to Read Literature Like a Professor
Thomas C. Foster, Harper, $14.99, 9780060009427

26. Lucky Peach, Issue 1: Ramen
Chris Ying (Ed.), McSweeney's, $10, 9781936365463

27. The Other Wes Moore
Wes Moore, Spiegel & Grau, $15, 9780385528207

28. Four Fish
Paul Greenberg, Penguin, $16, 9780143119463

29. What to Expect When You're Expecting
Heidi Murkoff, Sharon Mazel, Workman, $14.95, 9780761148579

30. The Four Agreements
Don Miguel Ruiz, Amber-Allen, $12.95, 9781878424310

31. The Tiger
John Vaillant, Vintage, $15, 9780307389046

32. The Memory Palace
Mira Bartok, Free Press, $15, 9781439183328

33. Blink
Malcolm Gladwell, Back Bay, $15.99, 9780316010665

34. Three Cups of Deceit
Jon Krakauer, Anchor, $9.95, 9780307948762

35. The Sweet Life in Paris
David Lebovitz, Broadway, $14, 9780767928892

36. The Old Rules of Marketing Are Dead
Timothy R. Pearson, McGraw-Hill, $18, 9780071788229

37. The Old Farmer's Almanac 2012
Old Farmer's Almanac, $6.95, 9781571985446

38. Freakonomics
Steven D. Levitt, Stephen J. Dubner, Harper Perennial, $15.99, 9780060731335

39. What the Dog Saw
Malcolm Gladwell, Back Bay, $16.99, 9780316076203

40. Medium Raw
Anthony Bourdain, Ecco, $15.99, 9780061718953

41. Super Natural Every Day
Heidi Swanson, Ten Speed Press, $23, 9781580082778

42. The Last Stand
Nathaniel Philbrick, Penguin, $18, 9780143119609

43. The Elements of Style, 4th Edition
William Strunk Jr., E.B. White, Pearson, $9.95, 9780205309023

44. Into the Wild
Jon Krakauer, Anchor, $14.95, 9780307387172

45. Eat to Live
Joel Fuhrman, Little Brown, $15.99, 9780316120913

46. Moneyball
Michael Lewis, Norton, $15.95, 9780393338393

47. The Dirty Life
Kristin Kimball, Scribner, $15, 9781416551614

48. The Most Beautiful Walk in the World
John Baxter, Harper Perennial, $14.99, 9780061998546

49. Citizens of London
Lynne Olson, Random House, $17, 9780812979350

50. Eating Animals
Jonathan Safran Foer, Back Bay, $14.99, 9780316069885