Based on sales for the week ending August 5, 2012

16. The Presidents Club
Nancy Gibbs, Michael Duffy, S&S, $32.50, 9781439127704

17. The Passage of Power
Robert A. Caro, Knopf, $35, 9780679405078

18. Wheat Belly
William Davis, Rodale , $25.99, 9781609611545

19. The Price of Inequality
Joseph E. Stiglitz, Norton, $27.95, 9780393088694

20. Goodnight iPad
Ann Droyd, Blue Rider, $14.95, 9780399158568

21. Yes, Chef
Marcus Samuelsson, Random House, $27, 9780385342605

22. Why Does the World Exist?
Jim Holt, Liveright, $27.95, 9780871404091

23. Red Ink
David Wessel, Crown Business, $22, 9780770436148

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

25. When Women Were Birds
Terry Tempest Williams, FSG, $23, 9780374288976

26. The Violinist's Thumb
Sam Kean, Little Brown, $25.99, 9780316182317

27. Are You My Mother?
Alison Bechdel, Houghton Mifflin Harcourt, $22, 9780618982509

28. Dream Team
Jack McCallum, Ballantine, $28, 9780345520487

29. Drift
Rachel Maddow, Crown, $25, 9780307460981

30. I Hate Everyone... Starting with Me
Joan Rivers, Berkley, $25.95, 9780425248300

31. Thinking, Fast and Slow
Daniel Kahneman, FSG, $30, 9780374275631

32. Teach Your Children Well
Madeline Levine, Phd Madeline Levine, Harper, $26.99, 9780061824746

33. I Am a Pole (and So Can You!)
Stephen Colbert, Paul Hildebrandt (Illus.), Grand Central, $15.99, 9781455523429

34. The Blood Sugar Solution
Mark Hyman M.D., Little Brown, $27.99, 9780316127370

35. Bailout
Neil Barofsky, Free Press, $26, 9781451684933

36. Bringing Up Bébé
Pamela Druckerman, Penguin Press, $25.95, 9781594203336

37. Behind the Beautiful Forevers
Katherine Boo, Random House, $27, 9781400067558

38. Mick
Christopher Andersen, Gallery, $27, 9781451661446

39. The Righteous Mind
Jonathan Haidt, Pantheon, $28.95, 9780307377906

40. End This Depression Now!
Paul Krugman, Norton, $24.95, 9780393088779

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

42. This Is How
Augusten Burroughs, St. Martin's, $24.99, 9780312563554

43. A Daughter's Tale
Mary Soames, Random House, $28, 9780812993332

44. Gifts of the Crow
John Marzluff, Tony Angell, Free Press, $25, 9781439198735

45. Cronkite
Douglas Brinkley, Harper, $34.99, 9780061374265

46. I Suck at Girls
Justin Halpern, It Books, $16.99, 9780062113375

47. Wherever I Wind Up
R.A. Dickey, Blue Rider, $26.95, 9780399158155

48. My Cross to Bear
Gregg Allman, Morrow, $27.99, 9780062112033

49. Barack Obama
David Maraniss, S&S, $32.50, 9781439160404

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