Based on sales for the week ending August 21, 2011

16. A First-Rate Madness
Nassir Ghaemi, Penguin Press, $27.95, 9781594202957

17. The Psychopath Test
Jon Ronson, Riverhead, $25.95, 9781594488016

18. Area 51
Annie Jacobsen, Little Brown, $27.99, 9780316132947

19. Blood, Bones & Butter
Gabrielle Hamilton, Random House, $26, 9781400068722

20. To End All Wars
Adam Hochschild, Houghton Mifflin Harcourt, $28, 9780618758289

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

22. Reckless Endangerment
Gretchen Morgenson, Joshua Rosner, Times Books, $30, 9780805091205

23. Absolute Monarchs
John Julius Norwich, Random House, $30, 9781400067152

24. The Beginning of Infinity
David Deutsch, Viking, $30, 9780670022755

25. The Secrets of the FBI
Ronald Kessler, Crown, $26, 9780307719690

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

27. Wendy and the Lost Boys
Julie Salamon, Penguin Press, $29.95, 9781594202988

28. A Book of Secrets
Michael Holroyd, FSG, $26, 9780374115586

29. Sh*t My Dad Says
Justin Halpern, It Books, $15.99, 9780061992704

30. All My Friends Are Dead
Avery Monsen, Jory John, Chronicle, $9.95, 9780811874557

31. Cleopatra
Stacy Schiff, Little Brown, $29.99, 9780316001922

32. Cocktail Hour Under the Tree of Forgetfulness
Alexandra Fuller, Penguin Press, $25.95, 9781594202995

33. Mission Street Food
Karen Leibowitz, Anthony Myint, McSweeney's, $30, 9781936365159

34. A World on Fire
Amanda Foreman, Random House, $35, 9780375504945

35. The Pirates of Somalia
Jay Bahadur, Pantheon, $26.95, 9780307379061

36. The Story of Charlotte's Web
Michael Sims, Walker, $25, 9780802777546

37. After America
Mark Steyn, Regnery, $29.95, 9781596981003

38. The Tao of Travel
Paul Theroux, Houghton Mifflin Harcourt, $25, 9780547336916

39. Miette
Meg Ray, Chronicle, $27.50, 9780811875042

40. Haiti After the Earthquake
Paul Farmer, PublicAffairs, $27.99, 9781586489731

41. Sex on the Moon
Ben Mezrich, Doubleday, $26.95, 9780385533928

42. God, No!
Penn Jillette, Simon & Schuster, $24.99, 9781451610369

43. Tolstoy and the Purple Chair
Nina Sankovitch, Harper, $23.99, 9780061999840

44. Joy of Cooking (75th Anniversary Ed.)
Irma S. Rombauer, et al., Scribner, $35, 9780743246262

45. Sleeping with the Enemy
Hal Vaughan, Knopf, $27.95, 9780307592637

46. On China
Henry Kissinger, Penguin Press, $36, 9781594202711

47. Dog Sense
John Bradshaw, Basic Books, $25.99, 9780465019441

48. Those Guys Have All the Fun
James Andrew Miller, Tom Shales, Little Brown, $27.99, 9780316043007

49. There Are Things I Want You to Know about Stieg Larsson and Me
Eva Gabrielsson, Seven Stories, $23.95, 9781609803636

50. The 4-Hour Body
Timothy Ferriss, Crown, $27, 9780307463630