Some fiction books are more then entertainment. Every so often you read a book (or in this case 'books') that really grab you and make you think.
Daniel Suarez has written a pair of books that nail it. Daemon and FreedomTM. If you've got a day free (you'll need it because you likely won't want to put these books down until you're done) and want to have your view of the world shaken up a bit, these near-future sci-fi books are worth every penny (thanks to Brad Feld for the pointer via his blog: http://bit.ly/A7uZVC ).
For more on the books and it's author: http://thedaemon.com/
Daemon & its sequel, FreedomTM - by Daniel Suarez