Based on sales for the week ending April 14, 2013

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

17. How to Tell If Your Cat Is Plotting to Kill You
Matthew Inman, Andrews McMeel, $14.99, 9781449410247

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

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

20. The 5 Love Languages
Gary Chapman, Northfield, $14.99, 9780802473158

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

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

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

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

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

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

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

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

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

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

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

32. The Hare With Amber Eyes
Edmund de Waal, Picador, $16, 9780312569372

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

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

35. Paris: A Love Story
Kati Marton, S&S, $14.99, 9781451691559

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

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

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

39. The Social Conquest of Earth
Edward Osborne Wilson, Liveright , $17.95, 9780871403636

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

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

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

43. F for Effort!
Richard Benson, Chronicle, $9.95, 9781452113227

44. The Worst Hard Time
Timothy Egan, Mariner, $14.95, 9780618773473

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

46. Prague Winter
Madeleine Albright, Harper Perennial, $15.99, 9780062030344

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

48. The Power of Now
Eckhart Tolle, New World , $15, 9781577314806

49. The Righteous Mind
Jonathan Haidt, Vintage, $16, 9780307455772

50. This Explains Everything
John Brockman (Ed.), Harper Perennial, $15.99, 9780062230171