Reading this thread was like a walk down memory lane:
All from childhood
VC Andrews (Incest 101 for teens)
Dragonriders of Pern (still want a dragon)
Thomas Covenant
Clan of the Cave Bear
Hitchhiker's Guide to the Galaxy
Pier's Anthony
There are TONS.
Now
Song of Fire and Ice
Harry Potter
Ender
Foundation
Anne Rice Vampire Series
Anne Rice Witch Series
Anne Rice Sleeping Beauty (I KID!!! though I did start it
)
I didn't see Frank Herbert's Dune!!!
For the basis of a quick read and entertainment value:
Twilight
Hunger Games