After all this time, i've recieved a message from "anonymousfinder" at book crossing dot com from Xalapa, Mexico, a book has been found and passed on! I assume it's book 14, that was released in Veracruz, a short distance away from Xalapa. Thank you anonymous finder!!
It's been so long since i've heard from the rest of them. If you have one please drop me a line, let me know they're okay!
Have a fantastic day