I found this list on another blog and I liked it. Bold are ones I’ve read and italics are ones that I’m reading/own and have started reading. 

1) Harry Potter and the Sorcerer’s Stone by J.K. Rowling 

2) Harry Potter and the Chamber of Secrets by J.K. Rowling 

3) Harry Potter and the Prisoner of Azkaban by J.K. Rowling 

4) Harry Potter and the Goblet of Fire by J.K. Rowling 

5) Harry Potter and the Order of the Phoenix by J.K. Rowling

6) Harry Potter and the Half-Blood Prince by J.K. Rowling 

7) Harry Potter and the Deathly Hallows by J.K. Rowling 

8) The Hobbit by J.R.R. Tolkien

9) The Da Vinci Code by Dan Brown

10) 1984 by George Orwell 

11) Pride and Prejudice by Jane Austen

12) The Catcher in the Rye by J.D. Salinger 

13) To Kill a Mockingbird by Harper Lee 

14) The Great Gatsby by F. Scott Fitzgerald

15) The Lord of the Rings by J.R.R. Tolkien

16) The Kite Runner by Khaled Hosseini

17) Jane Eyre by Charlotte Bronte 

18) The Curious Incident of the Dog in the Night-Time by Mark Haddon 

19) Life of Pi by Yann Martel 

20) Animal Farm by George Orwell 

21) Angels & Demons by Dan Brown

22) Brave New World by Aldous Huxley 

23) Wuthering Heights by Emily Bronte 

24) One Hundred Years of Solitude by Gabriel Garcia Marquez

25) Memoirs of a Geisha by Arthur Golden

26) The Time Traveler’s Wife by Audrey Niffenegger 

27) The Odyssey by Homer 

28) Catch-22 by Homer

29) Slaughterhouse-five by Kurt Vonnegut 

30) Crime and Punishment by Fyodor Dostoyevsky

31) Fahrenheit 451 by Ray Bradbury 

32) American Gods by Neil Gaiman 

33) The Chronicles of Narnia by C.S. Lewis 

34) The Hitchhiker’s Guide to the Galaxy by Douglas Adams 

35) Lord of the Flies by William Golding 

36) The Lovely Bones by Alice Sebold

37) Ender’s Game by Orson Scott Card 

38) The Golden Compass by Philip Pullman 

39) Good Omens: The Nice and Accurate Prophecies of Agnes Nutter, Witch by Neil Gaiman 

40) Dune by Frank Herbert 

41) Emma by Jane Austen 

42) Frankenstein by Mary Wollstonecraft Shelley

43) The Adventures of Huckleberry Finn by Mark Twain

44) Anna Karenina by Leo Tolstoy

45) Jonathan Strange & Mr. Norrell by Susanna Clarke 

46) Middlesex: A Novel by Jeffrey Eugenides 

47) Wicked by Gregory Maguire

48) Lolita by Vladimir Nabokov

49) The Silmarillion by J.R.R. Tolkien 

50) The Iliad by Homer 

51) The Stranger by Albert Camus

52) Sense and Sensibility by Jane Austen 

53) Great Expectations by Charles Dickens

54) The Handmaid’s Take by Margaret Atwood 

55) On the Road by Jack Kerouac

56) Freakonomics by Steven D. Levitt 

57) The Little Prince by Antoine de Saint Exupery

58) A Wrinkle in Time by Madeleine L’Engle 

59) Neverwhere by Neil Gaiman 

60) The Grapes of Wrath 

61) Little Women by Louisa May Alcott

62) The Name of the Rose by Umberto Eco 

63) The Scarlet Letter by Nathaniel Hawthorne 

64) Moby Dick by Herman Melville

65) The Complete Works by William Shakespeare

66) Guns, Germs, and Steel by Jared Diamond 

67) Me Talk Pretty One Day by David Sedaris 

68) The Poisonwood Bible by Barbara Kingslover 

69) Hamlet by William Shakespeare

70) Of Mice and Men by John Steinbeck 

71) A Tale of Two Cities by Charles Dickens 

72) The Alchemist by Paula Coelho

73) The Bell Jar by Sylvia Plath 

74) The Picture of Dorian Gray by Oscar Wilde 

75) The Elements of Style by William Strunk 

76) Love in the Time of Cholera by Gabriel Garcia Marquez 

77) The Subtle Knife by Philip Pullman 

78) Atonement by Ian McEwan 

79) The Brothers Karamazov by Fyodor Dostoevsky 

80) The Secret Life of Bee by Sue Monk Kidd

81) Dracula by Bram Stoker

82) Heart of Darkness by Joseph Conrad

83) A Clockwork Orange by Anthony Burgess

84) Don Quixote by Miguel de Cervantes Saavedra 

85) The Amber Spyglass by Philip Pullman 

86) A Portrait of the Artist as a Young Man by James Joyce 

87) The Unbearable Lightness of Being by Milan Kundera

88) Siddhartha by Hermann Hesse 

89) Neuromancer by William Gibson

90) The Canterbury Tales by Geoffrey Chaucer 

91) Persuasion by Jane Austen

92) Anansi Boys by Neil Gaiman

93) The Historian by Elizabeth Kostova

94) Angela’s Ashes by Frank McCourt

95) A Heartbreaking Work of Staggering Genius by Dave Eggers

96) Oh the Glory of It All by Sean Wilsey

97) Thank You, Jeeves by P.G. Wodehouse

98) The History Boys by Alan Bennett

99) Twilight by Stephanie Meyer

100) The Prince by Niccolo Machiavelli

A few additions of my own, original list from Be Naughty and Love It!