I received the correct solution from Larry G. over the weekend. This hunt has been solved and I've awarded the prize to Larry. I'll be providing more details on my site along with a full solution later this week.
Thanks to everyone who bought the book and took a shot at it! It was a great adventure for me to be on the other end (making the treasure hunt) instead of being the one looking for it. I hope it was fun for those who were working on it as well. I'll be sure to do another one in the near future.