What was a book so good that you have ReRead it?

The Revival, Stephen King (×3)
East of Eden, John Steinbeck (×5)
Dreamquest of Unknown Kadath, H.P. Lovecraft (×2)

And I plan on rereading:

The Exorcist, William Peter Blatty
Fear and Trembling, Søren Kierkegaard
Crime and Punishment, Fyodor Dostoyevsky
Blood Meridian, Cormac McCarthy (after a bit of therapy)
Lonesome Dove, Larry McMurthy
Ian Toll's Pacific War trilogy
The Things Our Fathers Saw, Matthew A. Rozell