Based on sales for the week ending April 10, 2011

16. Swamplandia!
Karen Russell, Knopf, $24.95, 9780307263995

17. Drawing Conclusions
Donna Leon, Atlantic Monthly, $24, 9780802119797

18. A Discovery of Witches
Deborah Harkness, Viking, $28.95, 9780670022410

19. Emily, Alone
Stewart O'Nan, Viking, $25.95, 9780670022359

20. Live Wire
Harlan Coben, Dutton, $27.95, 9780525952060

21. I'll Walk Alone
Mary Higgins Clark, Simon & Schuster, $25.99, 9781439180969

22. Squirrel Seeks Chipmunk
David Sedaris, Ian Falconer (Illus.), Little Brown, $21.99, 9780316038393

23. Once Upon a Time, There Was You
Elizabeth Berg, Random House, $26, 9781400068654

24. Minding Frankie
Maeve Binchy, Knopf, $26.95, 9780307273567

25. Freedom
Jonathan Franzen, FSG, $28, 9780374158460

26. Elizabeth I
Margaret George, Viking, $30, 9780670022533

27. When the Killing's Done
T.C. Boyle, Viking , $26.95, 9780670022328

28. The Uncoupling
Meg Wolitzer, Riverhead, $25.95, 9781594487880

29. The Love of My Youth
Mary Gordon, Pantheon, $25.95, 9780307377425

30. Three Stages of Amazement
Carol Edgarian, Scribner, $25, 9781439198308

31. Mystery
Jonathan Kellerman, Ballantine, $28, 9780345505699

32. Say Her Name
Francisco Goldman, Grove Press, $24, 9780802119810

33. Please Look After Mom
Kyung-Sook Shin, Kyong-Suk Sin, Knopf, $24.95, 9780307593917

34. Miss Julia Rocks the Cradle
Ann B. Ross, Viking, $25.95, 9780670022557

35. Cold Wind
C.J. Box, Putnam, $25.95, 9780399157356

36. Toys
James Patterson, Neil McMahon, Little Brown, $27.99, 9780316097369

37. The Help
Kathryn Stockett, Amy Einhorn Books/Putnam, $24.95, 9780399155345

38. Trinity Six
Charles Cumming, St. Martin's, $24.99, 9780312675295

39. One of Our Thursdays Is Missing
Jasper Fforde, Viking, $25.95, 9780670022526

40. Treason at Lisson Grove
Anne Perry, Ballantine Books, $26, 9780345510587

41. Crunch Time
Diane Mott Davidson, Morrow, $26.99, 9780061348150

42. The Weird Sisters
Eleanor Brown, Amy Einhorn Books/Putnam, $24.95, 9780399157226

43. Heads You Lose
Lisa Lutz, David Hayward, Putnam, $24.95, 9780399157400

44. 44 Charles Street
Danielle Steel, Delacorte, $28, 9780385343145

45. The Peach Keeper
Sarah Addison Allen, Bantam, $25, 9780553807226

46. Georgia Bottoms
Mark Childress, Little Brown, $24.99, 9780316033046

47. A Red Herring Without Mustard
Alan Bradley, Delacorte, $23, 9780385342322

48. The Jungle
Clive Cussler, Jack Du Brul, Putnam, $27.95, 9780399157042

49. Lover Unleashed
J.R. Ward, NAL, $27.95, 9780451233165

50. An Object of Beauty
Steve Martin, Grand Central, $26.99, 9780446573641