Based on sales for the week ending May 1, 2011

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

17. I'm Over All That
Shirley MacLaine, Atria, $22, 9781451607291

18. Unfamiliar Fishes
Sarah Vowell, Riverhead, $25.95, 9781594487873

19. My Father's Daughter
Gwyneth Paltrow, Grand Central, $30, 9780446557313

20. Reading My Father
Alexandra Styron, Scribner, $25, 9781416591795

21. Wizard of Lies
Diana B. Hanriques, Times Books, $30, 9780805091342

22. Fire Season
Philip Connors, Ecco, $24.99, 9780061859366

23. Idea Man
Paul Allen, Portfolio, $27.95, 9781591843825

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

25. Battle Hymn of the Tiger Mother
Amy Chua, Penguin Press, $25.95, 9781594202841

26. Life
Keith Richards, Little Brown, $29.99, 9780316034388

27. All That Is Bitter and Sweet
Ashley Judd, Ballantine, $26, 9780345523617

28. Tangled Webs
James B. Stewart, Penguin Press, $29.95, 9781594202698

29. Physics of the Future
Michio Kaku, Doubleday, $28.95, 9780385530804

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

31. A Covert Affair
Jennet Conant, S&S, $28, 9781439163528

32. The Dressmaker of Khair Khana
Gayle Tzemach Lemmon, Harper, $24.99, 9780061732379

33. 63 Documents the Government Doesn't Want You to Read
Jesse Ventura, Dick Russell, Skyhorse, $24.95, 9781616082260

34. This Is a Book
Demetri Martin, Grand Central, $24.99, 9780446539708

35. Autobiography of Mark Twain
Mark Twain, University of California Press, $34.95, 9780520267190

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

37. The Information
James Gleick, Pantheon, $29.95, 9780375423727

38. The Origins of Political Order
Francis Fukuyama, FSG, $35, 9780374227340

39. Hitman
Howie Carr, Forge, $25.99, 9780765326393

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

41. Barefoot Contessa How Easy Is That?
Ina Garten, Clarkson Potter, $35, 9780307238764

42. A Band of Misfits
Andrew Baggarly, Triumph, $19.95, 9781600785986

43. The Bond
Wayne Pacelle, Morrow, $26.99, 9780061969782

44. The Long Goodbye
Meghan O'Rourke, Riverhead, $25.95, 9781594487989

45. At Home
Bill Bryson, Doubleday, $28.95, 9780767919388

46. A Widow's Story
Joyce Carol Oates, Ecco, $27.99, 9780062015532

47. Townie
Andre Dubus III, Norton, $25.95, 9780393064667

48. Twelve Steps to a Compassionate Life
Karen Armstrong, Knopf, $22.95, 9780307595591

49. Liberty Defined
Ron Paul, Grand Central, $24.99, 9781455501458

50. Salad as a Meal
Patricia Wells, Morrow, $34.99, 9780061238833