Based on sales for the week ending March 20, 2011

16. Three Cups of Tea
Greg Mortenson, David Oliver Relin, Penguin, $16, 9780143038252

17. Mennonite in a Little Black Dress
Rhoda Janzen, Holt, $14, 9780805092257

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

19. Taking the Leap
Pema Chodron, Shambhala, $14, 9781590308431

20. Orange Is the New Black
Piper Kerman, Spiegel & Grau, $15, 9780385523394

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

22. Every Day in Tuscany
Frances Mayes, Broadway, $15, 9780767929837

23. Eaarth
Bill McKibben, St. Martin's Griffin, $14.99, 9780312541194

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

25. The Book of Awakening
Mark Nepo, Conari, $18.95, 9781573241175

26. The Other Wes Moore
Wes Moore, Spiegel & Grau, $15, 9780385528207

27. Half the Sky
Nicholas D. Kristof, Sheryl WuDunn, Vintage, $15.95, 9780307387097

28. Infinite City: A San Francisco Atlas
Rebecca Solnit, Sandow Birk (Illus.), University of California Press, $24.95, 9780520262508

29. The Speech
Bernie Sanders, Nation Books, $13, 9781568586847

30. Making Toast
Roger Rosenblatt, Ecco Press, $12.99, 9780061825958

31. The Poisoner's Handbook
Deborah Blum, Penguin, $16, 9780143118824

32. The Cello Suites
Eric Siblin, Grove, $15.95, 9780802145246

33. Silk Parachute
John McPhee, FSG, $15, 9780374532628

34. Awkward Family Photos
Mike Bender, Doug Chernack, Three Rivers, $15, 9780307592293

35. Blink
Malcolm Gladwell, Back Bay, $15.99, 9780316010665

36. Christianity
Diarmaid MacCulloch, Penguin, $25, 9780143118695

37. Where Men Win Glory
Jon Krakauer, Anchor, $15.95, 9780307386045

38. Everyone Loves You When You're Dead
Neil Strauss, It Books, $16.99, 9780061543678

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

40. Women Food and God
Geneen Roth, Scribner, $15, 9781416543084

41. The Devil in the White City
Erik Larson, Vintage, $15.95, 9780375725609

42. Rand McNally 2011 Road Atlas
Rand McNally, $13.95, 9780528355288

43. The Tipping Point
Malcolm Gladwell, Back Bay, $15.99, 9780316346627

44. The Man Who Loved Books Too Much
Allison Hoover Bartlett, Riverhead, $15, 9781594484810

45. The Big Burn
Timothy Egan, Mariner, $15.95, 9780547394602

46. Savor
Thich Nhat Hanh, Lilian Cheung, HarperOne, $15.99, 9780061697708

47. Stones Into Schools
Greg Mortenson, Penguin, $16, 9780143118237

48. The Power of Now
Eckhart Tolle, New World , $14, 9781577314806

49. Shop Class as Soulcraft
Matthew B. Crawford, Penguin, $15, 9780143117469

50. The Checklist Manifesto
Atul Gawande, Picador, $15, 9780312430009