Based on sales for the week ending April 28, 2013

16. Bossypants
Tina Fey, Reagan Arthur Books, $15.99, 9780316056878

17. Tiny Beautiful Things
Cheryl Strayed, Vintage, $14.95, 9780307949332

18. The Four Agreements
Don Miguel Ruiz, Amber-Allen, $12.95, 9781878424310

19. When Women Were Birds
Terry Tempest Williams, Picador, $15, 9781250024114

20. In the Garden of Beasts
Erik Larson, Broadway, $16, 9780307408853

21. Unlikely Friendships
Jennifer S. Holland, Workman, $13.95, 9780761159131

22. F in Exams
Richard Benson, Chronicle, $9.95, 9780811878319

23. Subliminal
Leonard Mlodinow, Vintage, $15, 9780307472250

24. What My Mother Gave Me
Elizabeth Benedict (Ed.), Algonquin, $15.95, 9781616201357

25. Lady Almina and the Real Downton Abbey
The Countess of Carnarvon, Broadway, $15.99, 9780770435622

26. The Devil in the White City
Erik Larson, Vintage, $16, 9780375725609

27. Why Be Happy When You Could Be Normal?
Jeanette Winterson, Grove Press, $15, 9780802120878

28. God's Hotel
Victoria Sweet, Riverhead, $16, 9781594486548

29. The Immortal Life of Henrietta Lacks
Rebecca Skloot, Broadway, $16, 9781400052189

30. How to Be Interesting: (In 10 Simple Steps)
Jessica Hagy, Workman, $10.95, 9780761174707

31. ObamaCare Survival Guide
Nick J. Tate, Humanix, $19.95, 9780893348625

32. Outliers
Malcolm Gladwell, Back Bay, $16.99, 9780316017930

33. Paris in Love: A Memoir
Eloisa James, Random House , $15, 9780812981902

34. This Is How
Augusten Burroughs, Picador USA, $15, 9781250032102

35. The Presidents Club
Nancy Gibbs, Michael Duffy, S&S, $18, 9781439127728

36. Waking Up in Heaven
Crystal McVea, Alex Tresniowski, Howard Books, $15.99, 9781476711874

37. What to Expect When You're Expecting
Heidi Murkoff, Sharon Mazel, Workman, $14.95, 9780761148579

38. The Untethered Soul
Michael A. Singer, New Harbinger, $16.95, 9781572245372

39. Some Assembly Required
Anne Lamott, Riverhead, $16, 9781594486678

40. Call the Midwife
Jennifer Worth, Penguin, $16, 9780143123255

41. The Price of Inequality
Joseph E. Stiglitz, Norton , $16.95, 9780393345063

42. Heaven Is for Real
Todd Burpo, Thomas Nelson, $16.99, 9780849946158

43. Eat to Live
Joel Fuhrman, Little Brown, $15.99, 9780316120913

44. Team of Rivals
Doris Kearns Goodwin, S&S, $21, 9781451688092

45. Steal Like an Artist
Austin Kleon, Workman, $10.95, 9780761169253

46. Night
Elie Wiesel, FSG, $9.95, 9780374500016

47. Are You My Mother?
Alison Bechdel, Mariner Books, $15.95, 9780544002234

48. Wreck This Journal
Keri Smith, Perigee, $13.95, 9780399533464

49. Season of the Witch
David Talbot, Free Press, $16, 9781439108246

50. The Happiness Project
Gretchen Rubin, Harper, $14.99, 9780061583261