I stumbled upon this book while I was walking around the library today and while it isn't officially a "teen" book, I thought it was still worth drawing attention to. Level 26: Dark Origins is written by the creator and executive producer of the show CSI: Crime Scene Investigation. What is particularly cool about it is that it is an interactive digi-novel. Although you can read the book as a traditional thriller, about every 20 pages, there are web links to videos on the book's website that bring the characters to life and extend the story. I haven't seen an interactive book like this since I was a kid and was obsessed with Choose Your Own Adventure novels. Check it out and let me know what you think!