So Yesterday Unknown - 2006

From the publisher

"We are all around you.
You don't think about us much, because we are invisible. Well, not exactly invisible. A lot of us have hair dyed in four colors, or wear five-inch platform sneakers, or carry enough metal in our skin that it's a hassle getting on an airplane. Quite visible, actually, come to think of it.But we don't wear signs saying what we are. After all, if you knew what we were up to, we couldn't work our magic. We have to observe carefully, and push and prompt you in ways you don't notice. Like good teachers, we let you think you've discovered the truth on your own.
And you need us. Someone has to guide you, to mold you, to make sure that today turns into yesterday on schedule. Because frankly, without us to monitor the situation, who knows what would get crammed down your throats? It's not like you can just start making your own decisions, after all.
"Ever wonder who was the first kid to keep a wallet on a big chunky chain, or wear way-too-big-pants on purpose? What about the mythical first guy who wore his baseball cap backwards? These are the Innovators, the people at the peak of the cool pyramid.
Seventeen-year-old Hunter Braque is a Trend setter, on the second level of the pyramid. His job: find the newest, coolest thing for the retail market. His MO: observe, don't get involved. But from the moment he meets Innovator Jen James, he can't help getting involved in a big way.Part love story, part mystery, part stinging satire, Scott Westerfeld's spellbinding new novel will make you question everything you've ever believed about how to be cool.