First sentence of the first chapter (not prologue) of 10 of my favorite books. You guess which.
1. And then, after walking all day through a golden haze od humid warmth that gathered about him like fine wet fleece, Valentine came to a great ridge of outcropping white stone overlooking the city of Pidruid.
2. As I left the Kenya beanstalk capsule he was right on my heels.
3. "You are a crook, James Bolivar diGriz," Inskipp said, making animal noises deep in his throat while shaking the sheaf of papers in my direction.
4. The day my uncle Camlach came home, I was just six years old.
5. In the autumn season of the wine, word went forth from among the cypresses and olives and laden vines of his country estate that Sandre, Duke of Astibar, once ruler of that city and its provence, had drawn the last bitter breath of his exile and age and died.
6. "Draw, tenderfoot, or I'll plug you where you stand!"
7. Griffin Moss: It's good to get in touch with you at last.
8. "And I say you will!" bellowed the burly sheepfarmer, Dorthan Kanasson.
9. Even in high summer, Tintagel was a haunted place; Igraine, Lady of Duke Gorlois, looke dout over the sea from the headland.
10. I am afraid.
And I will say that number 7 is not usually shelved with F/SF, but it ought to be. 10 doesn't give much, so I might add the second sentence later.