These are the top 106 books most often marked as "unread" by LibraryThing's users (as of whenever this was originally posted). Bold is for books you've read. Underline is for books you own but haven't read. Italics for books you've started but haven't finished. Red is for books you found unreadable. Green for books you want to read but haven't yet. And, finally, leave the ones you haven't read as they are.
Jonathan Strange & Mr NorrellAnna KareninaCrime and Punishment
Catch-22
One Hundred Years of Solitude
Wuthering HeightsThe SilmarillionLife of Pi
The Name of the Rose
Don QuixoteMoby Dick
UlyssesMadame Bovary
The OdysseyPride and PrejudiceJane EyreA Tale of Two Cities
The Brothers Karamazov
Guns, Germs, and Steel: The Fates of Human Societies
War and PeaceVanity FairThe Time Traveler’s Wife
The Iliad
EmmaThe Blind Assassin
The Kite Runner
Mrs. Dalloway HATED IT!
Great ExpectationsAmerican Gods
A Heartbreaking Work of Staggering Genius
Atlas Shrugged
Reading Lolita in Tehran
Memoirs of a Geisha
Middlesex
Quicksilver
WickedThe Canterbury Tales
The Historian
A Portrait of the Artist as a Young Man
Love in the Time of Cholera
Brave New World
The Fountainhead
Foucault’s Pendulum
MiddlemarchFrankenstein
The Count of Monte CristoDraculaA Clockwork Orange
Anansi Boys
The Once and Future KingThe Grapes of Wrath
The Poisonwood Bible
1984
Angels & DemonsThe Inferno
The Satanic Verses
Sense and SensibilityThe Picture of Dorian Gray
Mansfield Park
One Flew Over the Cuckoo’s Nest
To the Lighthouse
Tess of the D’Urbervilles
Oliver Twist
Gulliver’s TravelsLes MisérablesThe Corrections
The Amazing Adventures of Kavalier and Clay
The Curious Incident of the Dog in the Night-TimeDuneThe Prince
The Sound and the Fury
Angela’s Ashes
The God of Small Things
A People’s History of the United States : 1492 - Present
Cryptonomicon
Neverwhere
A Confederacy of Dunces
A Short History of Nearly Everything
Dubliners
The Unbearable Lightness of Being
Beloved
Slaughterhouse-FiveThe Scarlet Letter
Eats, Shoots & Leaves: The Zero Tolerance Approach to PunctuationThe Mists of Avalon
Oryx and Crake
Collapse: How Societies Choose to Fail or Succeed
Cloud Atlas
The Confusion
Lolita
Persuasion
Northanger AbbeyThe Catcher in the Rye
On the Road
The Hunchback of Notre DameFreakonomicsZen and the Art of Motorcycle Maintenance
The Aeneid
Watership Down
Gravity’s Rainbow
The HobbitIn Cold Blood
White Teeth
Treasure IslandDavid Copperfield
The Three Musketeers