Based on sales for the week ending July 17, 2011

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

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

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

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

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

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

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

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

24. War
Sebastian Junger, Twelve, $15.99, 9780446556224

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

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

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

28. Drive
Daniel H. Pink, Riverhead, $16, 9781594484803

29. Thank You Notes
Jimmy Fallon, Grand Central, $12, 9780892967414

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

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

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

33. The Shallows
Nicholas Carr, Norton, $15.95, 9780393339758

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

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

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

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

38. Operation Mincemeat
Ben Macintyre, Broadway, $15, 9780307453280

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

40. The Power of Now
Eckhart Tolle, New World , $14, 9781577314806

41. The 5 Love Languages
Gary Chapman, Northfield, $14.99, 9780802473158

42. The Murder Room
Michael Capuzzo, Gotham, $17, 9781592406357

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

44. Gift From the Sea
Anne Morrow Lindbergh, Pantheon , $9.95, 9780679732419

45. Last Call
Daniel Okrent, Scribner, $17, 9780743277044

46. A Moveable Feast
Ernest Hemingway, Scribner, $15, 9781439182710

47. The Beekeeper's Lament
Hannah Nordhaus, Harper Perennial, $14.99, 9780061873256

48. The Tipping Point
Malcolm Gladwell, Back Bay, $15.99, 9780316346627

49. Superfreakonomics
Steven D. Levitt, Stephen J. Dubner, Harper Perennial, $15.99, 9780060889586

50. A Long Way Gone
Ishmael Beah, FSG, $12, 9780374531263