Based on sales for the week ending April 29, 2012

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

17. Killing Lincoln
Bill O'Reilly, Martin Dugard, Holt, $28, 9780805093070

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

19. Midnight in Peking
Paul French, Penguin, $26, 9780143121008

20. Go the F**k to Sleep
Adam Mansbach, Ricardo Cortes (Illus.), Akashic, $14.95, 9781617750250

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

22. Darth Vader and Son
Jeffrey Brown, Chronicle, $14.95, 9781452106557

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

24. A Natural Woman
Carole King, Grand Central, $27.99, 9781455512614

25. In the Garden of Beasts
Erik Larson, Crown, $26, 9780307408846

26. Mrs. Kennedy and Me
Clint Hill, Gallery, $26, 9781451648447

27. Drop Dead Healthy
A.J. Jacobs, S&S, $26, 9781416599074

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

29. Why Be Happy When You Could Be Normal?
Jeanette Winterson, Grove Press, $25, 9780802120106

30. When I Was a Child I Read Books
Marilynne Robinson, FSG, $24, 9780374298784

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

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

33. Dropped Names
Frank Langella, Harper, $25.99, 9780062094476

34. What Teachers Make
Taylor Mali, Putnam Adult, $19.95, 9780399158544

35. American Sniper
Chris Kyle, et al., Morrow, $26.99, 9780062082350

36. Subliminal
Leonard Mlodinow, Pantheon, $25.95, 9780307378217

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

38. Escape from Camp 14
Blaine Harden, Viking, $26.95, 9780670023325

39. The Pioneer Woman Cooks
Ree Drummond, Morrow, $29.99, 9780061997181

40. Jesus Calling
Sarah Young, Integrity , $15.99, 9781591451884

41. Catherine the Great
Robert K. Massie, Random House, $35, 9780679456728

42. Farther Away
Jonathan Franzen, FSG, $26, 9780374153571

43. The Laptop Millionaire
Mark Anastasi, Wiley, $22.95, 9781118271797

44. Revelations
Elaine Pagels, Viking, $27.95, 9780670023349

45. Why Nations Fail
Daron Acemoglu, James A. Robinson, Crown Business, $30, 9780307719218

46. Spiritual Solutions
Deepak Chopra, Harmony, $22, 9780307719171

47. Paris in Love
Eloisa James, Random House, $26, 9781400069569

48. A Wedding in Haiti
Julia Alvarez, Algonquin, $22.95, 9781616201302

49. After Camelot
J.Randy Taraborrelli, Grand Central, $29.99, 9780446553902

50. Worth Every Penny
Sarah Petty, Erin Verbeck, Greenleaf, $24.95, 9781608322770