Based on sales for the week ending July 31, 2011

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

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

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

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

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

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

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

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

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

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

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

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

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

29. Lunch in Paris
Elizabeth Bard, Back Bay, $13.99, 9780316042789

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

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

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

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

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

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

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

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

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

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

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

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

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

43. Are You There, Vodka? It's Me, Chelsea
Chelsea Handler, Simon Spotlight, $16, 9781416596363

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

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

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

47. My Horizontal Life
Chelsea Handler, Bloomsbury, $14.95, 9781582346182

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

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

50. Taking the Leap
Pema Chodron, Shambhala, $14, 9781590308431