Based on sales for the week ending April 17, 2011

16. Super Natural Every Day
Heidi Swanson, Ten Speed, $23, 9781580082778

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

18. Drive
Daniel H. Pink, Riverhead, $16, 9781594484803

19. The Dirty Life
Kristin Kimball, Scribner, $15, 9781416551614

20. Aftershock
Robert B. Reich, Vintage, $14.95, 9780307476333

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

22. This Is Not the Story You Think It Is
Laura Munson, Berkley, $15, 9780425238998

23. What the Dog Saw
Malcolm Gladwell, Back Bay, $16.99, 9780316076203

24. The King's Speech
Mark Logue, Peter Conradi, Sterling, $14.95, 9781402786761

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

26. Hellhound on His Trail
Hampton Sides, Anchor, $15.95, 9780307387431

27. Have a Little Faith
Mitch Albom, Hyperion, $13.99, 9781401310462

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

29. The Lost Cyclist
David Herlihy, Mariner, 14.95, 9780547521985

30. NurtureShock
Po Bronson, Ashley Merryman, Twelve, $14.99, 9780446504133

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

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

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

34. Making Rounds with Oscar
David Dosa, Hyperion, $13.99, 9781401310431

35. Clean
Alejandro Junger, HarperOne, $14.99, 9780061735332

36. Crow Planet
Lyanda Lynn Haupt, Back Bay, $14.99, 9780316019118

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

38. The Baseball Codes
Jason Turbow, Michael Duca, Anchor Books, $15, 9780307278623

39. Eating Animals
Jonathan Safran Foer, Back Bay, $14.99, 9780316069885

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

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

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

43. Parisians
Graham Robb, Norton, $17.95, 9780393339734

44. Now Eat This! Diet
Rocco DiSpirito, Grand Central, $22.99, 9780446584494

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

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

47. Ill Fares the Land
Tony Judt, Penguin, $15, 9780143118763

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

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

50. The Speech
Bernie Sanders, Nation, $13, 9781568586847