Not sure if it is well known here but the kickstarter for book seven is currently active until august the 4th. It has reached its goal but still need more money for art and a better chance for the other books to get released.
Just go to the kickstarter page and search for fabled lands.
Also finishing on the 4th of august is jonathan greens new gamebook Alice's Nightmare in Wonderland. This one still needs funds but so far its looking to good to pass up!