"Gone With the Wind". Unforgettable!
Or the longest book in the world (but it has to be interesting)
BIble followed by discworld
The collected works of Ayn Rand
Every Sarah Dessen book she wrights the most amazing books!
The Complete Works of the Lost Books of the Library of Alexandria...
Vampire Academy lol
I think the Never Ending Story would be it. As long as it never ends.