How do you beat the first level in the codebearers challenge internet game

If you mean solving the riddle at the beginning on the cell phone, the answer is in the title of the first book: HUnter Brown and the Secret of the Shadow. There's a nt for you. And the key for the book in the package is somewhere in the rest of the website. It's behind either the first or second book (go to the last page). To make it clear, if you go to the place where you can read the books on the site, the key is behind on of the books. Hope this helps, and if it doesn't, then check the forums. They helped me near the end of the game.