Best:
1. Wuthering Heights - Emily Bronte
2. The Picture of Dorian Gray - Oscar Wilde
3. The Count of Monte Cristo - Alexandre Dumas
Worst:
1. Twilight Series - Stephanie Meyers
This series is dreadful. I know many fandom writers that could out-write her any day. The story is so Mary Sue-ish and the classic love triangle filled with cliches and stamped vampires and shapeshifters over it to make it cool. It makes me cringe when I think about the vampires. They bring shame to the tales of Dracula and all the really good vampire tales made by other people.
I also cringe when I think that Hideo Kojima likes Twilight but then again I can see why he likes it. I mean, I used to like it as well but I also love my brutal vampires that don't sparkle in the sun but burn to death and better writing. It makes me sad when good writers are shoved aside for these aweful ones.
(Not counting HP. I love that series because at least it had layers upon layers of hints and themes that made a person think abod figure out how each event connected to each other and what was foreshadowing what.)
Anyways, I don't come across too many bad books and if I do I try to forget the book.