Looks to be a re-write of D123. Or at least the hex maps and certain features of the wandering monster tables reminded me of that series. The module is a huge campaign of over 50 pages and looks like it will need a group of gamers that can meet regularly for several sessions to finish. It has some of the best adventure maps in full color I have ever seen, particularly the outdoor ones. It has 2 detractors though that need fixing in a future update. The boxed text (monster stats) is way too small and what little art there is - is mostly wasted on images of pregenerated characters.