We're not done spilling secrets yet. Did you see the strange website on the copyright page? Www.NessieLives.com now re-directs to the 39 Clues website, but it looks like it used to lead to this fake page about the Loch Ness monster. What could this have to do with the Cahills?
To get all the info you could ever want, and then some, on The 39 Clues and its sequel series, Vespers vs. Cahills, check out the official website.
You may have heard of the creator of The 39 Clues. No, not Grace Cahill, but the author of the first book, Rick Riordan. His website has all you need to know about him, including upcoming signings and events.
The 39 Clues is in pre-production to hit the big screen in 2014. Who's in your dream cast?
In this Author of the Month interview, 39 Clues creator Rick Riordan reveals his favorite character and why The 39 Clues was the perfect project for him.
Rick Riordan spills the beans on the reason there are 39 clues (and not 79) and the Alfred Hitchcock connection in this interview with Scholastic.
In this video, super author Rick Riordan talks about why his kids love The 39 Clues.
Need help navigating the Cahills' online missions? This guy has a video walkthrough to get you through the sticky situations.
Sample the Maze of Bones audiobook with this short clip.
Haven't got enough? There's another audio sample here on Scholastic's website.
Want to know exactly what Grace said in her will? Now's your chance just as though you got a golden ticket to the will reading yourself.
How many historical figures and celebrities are Cahills? Who can you identify in this wallpaper?