Based on sales for the week ending May 15, 2011

16. Wicked Bugs
Amy Stewart, Algonquin, $18.95, 9781565129603

17. The Emperor of All Maladies
Siddhartha Mukherjee, Scribner, $30, 9781439107959

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

19. Stories I Only Tell My Friends
Rob Lowe, Holt, $26, 9780805093292

20. My Lucky Life In and Out of Show Business
Dick Van Dyke, Crown, $25, 9780307592231

21. Malcolm X
Manning Marable, Viking, $30, 9780670022205

22. 20 Years Younger
Bob Greene, Little Brown, $27.99, 9780316133784

23. The Best Advice I Ever Got
Katie Couric, Random House, $26, 9780812992779

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

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

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

27. Love Wins
Rob Bell, HarperOne, $22.99, 9780062049643

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

29. From This Moment on
Shania Twain, Atria, $26.99, 9781451620740

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

31. A Place of Yes
Bethenny Frankel, Touchstone, $24.99, 9781439186909

32. A Jane Austen Education
William Deresiewicz, Penguin Press, $25.95, 9781594202889

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

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

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

36. Founding Gardeners
Andrea Wulf, Knopf, $30, 9780307269904

37. 1861
Adam Goodheart, Knopf, $28.95, 9781400040155

38. The Wizard of Lies
Diana B. Henriques, Times Books, $30, 9780805091342

39. Robert Redford
Michael Feeney Callan, Knopf, $28.95, 9780679450559

40. The Notes
Ronald Reagan, Harper, $25.99, 9780062065131

41. The Reading Promise
Alice Ozma, Grand Central, $24.99, 9780446583770

42. The Heart and the Fist
Eric Greitens, Houghton Mifflin Harcourt, $27, 9780547424859

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

44. Knowing Your Value
Mika Brzezinski, Weinstein Books, $22.95, 9781602861343

45. Good Stuff
Jennifer Grant, Knopf, $24.95, 9780307267108

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

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

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

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

50. The Warmth of Other Suns
Isabel Wilkerson, Random House, $30, 9780679444329