Based on sales for the week ending March 25, 2012

16. Sarah's Key
Tatiana De Rosnay, St. Martin's, $13.99, 9781250004345

17. Extremely Loud and Incredibly Close
Jonathan Safran Foer, Mariner, $14.95, 9780547735023

18. A Lesson in Secrets
Jacqueline Winspear, Harper Perennial, $14.99, 9780061727719

19. Clara and Mr. Tiffany
Susan Vreeland, Random House, $15, 9780812980189

20. The Art of Hearing Heartbeats
Jan-Philipp Sendker, Other Press, $14.95, 9781590514634

21. The Girl Who Played With Fire
Stieg Larsson, Vintage, $15.95, 9780307454553

22. The Great Gatsby
F.Scott Fitzgerald, Scribner, $15, 9780743273565

23. When the Killing's Done
T.C. Boyle, Penguin, $16, 9780143120391

24. Dreams of Joy
Lisa See, Random House, $15, 9780812980547

25. Room
Emma Donoghue, Back Bay, $14.99, 9780316098328

26. Major Pettigrew's Last Stand
Helen Simonson, Random House, $15, 9780812981223

27. Before I Go to Sleep
S.J. Watson, Harper, $14.99, 9780062060563

28. The Story of Beautiful Girl
Rachel Simon, Grand Central, $12, 9780446574457

29. Tinker Tailor Soldier Spy
John le Carré, Penguin, $16, 9780143120933

30. The Wise Man's Fear
Patrick Rothfuss, DAW, $19, 9780756407124

31. Hotel on the Corner of Bitter and Sweet
Jamie Ford, Ballantine, $15, 9780345505347

32. The Patrick Melrose Novels
Edward St Aubyn, Picador, $20, 9780312429966

33. Fifty Shades of Grey
E.L. James, Writer's Coffee Shop, $29.99, 9781612130286

34. Abraham Lincoln: Vampire Hunter
Seth Grahame-Smith, Grand Central, $13.99, 9780446563079

35. The Imperfectionists
Tom Rachman, Dial, $15, 9780385343671

36. A Game of Thrones
George R.R. Martin, Bantam, $17, 9780553386790

37. The Kitchen House
Kathleen Grissom, Touchstone, $16, 9781439153666

38. Sisterhood Everlasting
Ann Brashares, Random House, $12, 9780385521239

39. A Dog's Purpose
W.Bruce Cameron, Forge, $12.99, 9780765330345

40. The Things They Carried
Tim O'Brien, Mariner, $14.95, 9780618706419

41. Turn of Mind
Alice LaPlante, Grove Press, $15, 9780802145901

42. Freedom
Jonathan Franzen, Picador, $16, 9780312576462

43. The Forgotten Waltz
Anne Enright, Norton, $15.95, 9780393342581

44. Murder in Passy
Cara Black, Soho Crime, $14, 9781616950637

45. City of Thieves
David Benioff, Plume, $15, 9780452295292

46. Started Early, Took My Dog
Kate Atkinson, Reagan Arthur, $14.99, 9780316066747

47. The Alchemist
Paulo Coelho, HarperOne, $14.99, 9780061122415

48. Squirrel Seeks Chipmunk
David Sedaris, Ian Falconer (Illus.), Back Bay, $13.99, 9780316038409

49. The Lucky One
Nicholas Sparks, Grand Central, $14.99, 9781455508969

50. The Elegance of the Hedgehog
Muriel Barbery, Europa Editions, $15, 9781933372600