Sorry, forgot to add the publisher stuff:
The Chaos Walking Series is published by Candlewick. It is good for ages 12 and up. The first two volumes are now available in paperback, the third is in hardcover only: Paperbacks are $9.99, Hardcover is $18.99.
The Third Place Teen Book Group (a real, good, name will be determined later!) will start in September and the first book will be The Knife of Never Letting Go. We will arrange the first discussion at Mr. Ness' visit on October 7 at 4 pm.
Here is a link to Patrick Ness' website: http://www.patrickness.com.