GIGA Quotes collects, among other things, the first lines from books, big and small. You can also choose an author, say Douglas Adams, and get something like this:
In the beginning, the universe was created. This has made a lot of people very angry, and is generally considered to have been a bad move.
The ships hung in the sky in much the same way that bricks don’t.
To summarize the summary of the summary: People are a problem.
The Answer to the Great Question Of . . . Life, the Universe and Everything . . . [is] Forty-two.
Far out in the uncharted backwaters of the unfashionable end of the Western Spiral arm of the Galaxy lies a small unregarded yellow sun.