The free serialized version from several years ago has been added to, scrubbed, edited, and generally improved upon. The adventure now is self-contained, from the surface ruins to the dreaded lowest levels, with a separate map book and illustration book (with pictures to show the players what they see at given places in the dungeons). You can get all three of the books that make up this adventure at RPGNow.com:
- Castle of the Mad Archmage Adventure Book (available in softcover or hardcover)
- Castle of the Mad Archmage Map Book (softcover only)
- Castle of the Mad Archmage Illustration Book (softcover only)
You can get get the whole set for $20 pdf, $35 with a softcover adventure book, and $45 with a hardcover adventure book (the map and illustration books are only available in softcover).
It's been a long time getting here, but I hope you have as much fun with it as I have over the years.