The way in which a book begins is important, in that it's indicative of the author's style as well as setting the tone for the entire piece of writing. It's like a walking in a front door; the way it is crafted can lend insight as to the treasures (or lack thereof) within.
Here are a few opening sentences of beloved science fiction books. See if you recognize any of them. Then visit this i09 article to see the books from which they came, as well as to read more examples. If your favorite sci-fi book opening sentences are not included in the article, tell us what they are in comments.
1) "Physicist Leonardo Vetra smelled burning flesh, and he knew it was his own."
2) "The five small craft passed from shadow, emerging with the suddenness of coins thrown into sunlight."
3) "He woke, and remembered dying."
Image: Wikipedia