I'm really loving Cory Doctorow's Little Brother (Tor), which Jonathan Hunt is reviewing for the July Horn Book. It's rare--always has been--to find YA realistic fiction that engages the political dimension, especially one so enthusiastic about disturbing the status quo. And it does so contagiously--I totally want to go out and hack something now.
And now, I can! Doctorow has compiled some how-to's for such plot points from his book as encrypting Gmail, starting a flash mob, blocking an RFID chip, and getting over a barbed-wire fence. Also included: "What to do when the police stop you."