Based on sales for the week ending September 18, 2011

16. Just My Type
Simon Garfield, Gotham, $27.50, 9781592406524

17. Guinness World Records 2012
Guinness, $28.95, 9781904994671

18. Turn Right at Machu Picchu
Mark Adams, Dutton, $26.95, 9780525952244

19. What It Is Like to Go to War
Karl Marlantes, Atlantic Monthly, $25, 9780802119926

20. Quite Enough of Calvin Trillin
Calvin Trillin, Random House, $27, 9781400069828

21. Grand Pursuit
Sylvia Nasar, S&S, $35, 9780684872988

22. Life Itself
Roger Ebert, Grand Central, $27.99, 9780446584975

23. The Social Animal
David Brooks, Random House, $27, 9781400067602

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

25. Every Day a Friday
Joel Osteen, Faithwords, $24.99, 9780892969913

26. Willpower
Roy F. Baumeister, John Tierney, Penguin Press, $27.95, 9781594203077

27. Nothing Daunted
Dorothy Wickenden, Scribner, $26, 9781439176580

28. Prime Time
Jane Fonda, Random House, $27, 9781400066971

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

30. Boo: The Life of the World's Cutest Dog
J.H. Lee, Chronicle, $12.95, 9781452103068

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

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

33. Rafa
Rafael Nadal, John Carlin, Hyperion, $27.99, 9781401324513

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

35. The End
Ian Kershaw, Penguin Press, $35, 9781594203145

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

37. Start Something That Matters
Blake Mycoskie, Spiegel & Grau, $22, 9781400069187

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

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

40. Believing Is Seeing
Errol Morris, Penguin Press, $40, 9781594203015

41. Happy Accidents
Jane Lynch, Hyperion, $25.99, 9781401341763

42. Top Secret America
Dana Priest, William M. Arkin, Little Brown, $27.99, 9780316182218

43. Lost in Shangri-La
Mitchell Zuckoff, Harper, $26.99, 9780061988349

44. SEAL Team Six
Howard E. Wasdin, Stephen Templin, St. Martin's, $26.99, 9780312699451

45. 101 Things to Learn in Art School
Kit White, MIT Press, $14.95, 9780262016216

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

47. Welcome to Your Child's Brain
Sam Wang, Sandra Aamodt, Bloomsbury , $26, 9781596916494

48. The Arrogant Years
Lucette Lagnado, Ecco Press, $25.99, 9780061803673

49. God, No!
Penn Jillette, S&S, $24.99, 9781451610369

50. Incognito
David M. Eagleman, Pantheon, $26.95, 9780307377333