What's your favorite opening sentence of a book?

And why?

My favorite opening sentence of any book is from The Winner of the National Book Award by Jincy Willet. It reads as follows:

“Lightning sought our mother out, when she was a young girl in Brown County, Indiana.”

I like this opening sentence more than others for many reasons. The first word is dangerous. Combine it with the second, and it is electricity on a mission. The next three words give continuity, providing survival. The closing clause provides a sense of time and place. All in all, the sentence introduces a book in which weather will play a significant part, as will searching for relationship between two twin sisters.