Cosmo Hill is a teenage orphan living in a Home for the Parentally Challenged in the near future, where they perform tests of new products on the boys living there. Cosmo and another inmate escape, but unfortunately the other guy dies and Cosmo almost does, too! He is rescued by a group that call themselves the Supernaturalists, and when he wakes up in their headquarters, he discovers that, just like them, he can see little blue creatures who suck life-force from people who are injured or dying. He joins their group in an attempt to rid the world of these creatures they call Parasites. But is he really on the right side?
This is an entertaining science-fiction story with plenty of action. The characters were pretty realistic and, ultimately, there was a pretty good "bad guy". The ending was totally satisfying, even a little emotional. Real old-fashioned heroism here! I liked this book. Some of the humor might be a little grown up (for example, in the future the lawyers are more powerful and dangerous than the police!) but it's really easy to read. I highly recommend this book. It's not as good as the Artemis Fowl books (by the same author), but it IS pretty good.
For a longer synopsis, read my "What I'm Reading Now" article.