Based on sales for the week ending May 15, 2011

16. The Tiger
John Vaillant, Vintage Departures, $15, 9780307389046

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

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

19. Role Models
John Waters, FSG, $15, 9780374532864

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

21. The Glass Castle
Jeannette Walls, Scribner, $16, 9780743247542

22. Packing for Mars
Mary Roach, Norton, $15.95, 9780393339918

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

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

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

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

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

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

29. Seeds
Richard Horan, Harper Perennial, $14.99, 9780061861680

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

31. Lunch in Paris
Elizabeth Bard, Back Bay, $13.99, 9780316042789

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

33. The Omnivore's Dilemma
Michael Pollan, Penguin, $16, 9780143038580

34. Are You There, Vodka? It's Me, Chelsea
Chelsea Handler, Simon Spotlight, $16, 9781416596363

35. Gift From the Sea
Anne Morrow Lindbergh, Pantheon , $9.95, 9780679732419

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

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

38. Pat the Zombie
Aaron XIMM, Kaveh Soofi (Illus.), Ten Speed Press, $11.99, 9781607740360

39. Take Good Care of the Garden and the Dogs
Heather Lende, Algonquin, $14.95, 9781616200510

40. Committed
Elizabeth Gilbert, Penguin, $16, 9780143118701

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

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

43. Soul Surfer
Bethany Hamilton, MTV Books, $14, 9781439165799

44. Citizens of London
Lynne Olson, Random House, $17, 9780812979350

45. Rand McNally Road Atlas 2012
Rand McNally, $13.95, 9780528003363

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

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

48. The CalorieKing Calorie, Fat & Carbohydrate Counter 2011
Allan Borushek, Family Health, $8.99, 9781930448339

49. My Horizontal Life
Chelsea Handler, Bloomsbury, $14.95, 9781582346182

50. How Did You Get This Number
Sloane Crosley, Riverhead, $15, 9781594485190