Based on sales for the week ending July 15, 2012

16. Seating Arrangements
Maggie Shipstead, Knopf, $25.95, 9780307599469

17. I, Michael Bennett
James Patterson, Michael Ledwidge, Little Brown, $27.99, 9780316097468

18. The Chaperone
Laura Moriarty, Riverhead, $26.95, 9781594487019

19. Istanbul Passage
Joseph Kanon, Atria, $26, 9781439156414

20. Home
Toni Morrison, Knopf, $24, 9780307594167

21. A Farewell to Arms
Ernest Hemingway, Scribner, $27, 9781451658163

22. The Impeachment of Abraham Lincoln
Stephen L. Carter, Knopf, $26.95, 9780307272638

23. Summerland
Elin Hilderbrand, Reagan Arthur, $26.99, 9780316099837

24. Defending Jacob
William Landay, Delacorte, $26, 9780385344227

25. The Next Best Thing
Jennifer Weiner, Atria, $26.99, 9781451617757

26. Wicked Business
Janet Evanovich, Bantam, $28, 9780345527776

27. Porch Lights
Dorothea Benton Frank, Morrow, $25.99, 9780061961298

28. The Innocent
David Baldacci, Grand Central, $27.99, 9780446572996

29. The Red House
Mark Haddon, Doubleday, $25.95, 9780385535779

30. Night Watch
Linda Fairstein, Dutton, $26.95, 9780525952633

31. How Should a Person Be?
Sheila Heti, Holt, $25, 9780805094725

32. The Long Earth
Terry Pratchett, Stephen Baxter, Harper, $25.99, 9780062067753

33. A Blaze of Glory
Jeff Shaara, Ballantine, $28, 9780345527356

34. Backfire
Catherine Coulter, Putnam Adult, $26.95, 9780399157325

35. The Shoemaker's Wife
Adriana Trigiani, Harper, $26.99, 9780061257094

36. Alif the Unseen
G.Willow Wilson, Grove Press, $25, 9780802120205

37. The Yard
Alex Grecian, Putnam, $26.95, 9780399149542

38. Redshirts
John Scalzi, Tor, $24.99, 9780765316998

39. Criminal
Karin Slaughter, Delacorte, $27, 9780345528506

40. Doctor Who: Shada
Gareth Roberts, Ace, $26.95, 9780425259986

41. The Queen's Lover
Francine Du Plessix Gray, Penguin Press, $25.95, 9781594203374

42. Bloodline
James Rollins, Morrow, $27.99, 9780061784798

43. Heading Out to Wonderful
Robert Goolrick, Algonquin, $24.95, 9781565129238

44. Die a Stranger
Steve Hamilton, Minotaur, $25.99, 9780312640217

45. The Song of Achilles
Madeline Miller, Ecco, $25.99, 9780062060617

46. The Marriage Plot
Jeffrey Eugenides, FSG, $28, 9780374203054

47. Capital
John Lanchester, Norton, $26.95, 9780393082074

48. The World Without You
Joshua Henkin, Pantheon, $25.95, 9780375424366

49. 2312
Kim Stanley Robinson, Orbit, $25.99, 9780316098120

50. The Great Escape
Susan Elizabeth Phillips, Morrow, $25.99, 9780062106063