For years at conventions, I’ve been asked if the Castle of the Mad Archmage adventure book was available in a 5th Edition-friendly format. Well, now I can finally say the answer is yes!
You can get the adventure book, map book, and illustration book as a bundle in print here, or in digital format here.
The same classic megadungeon; vast, more than 13 levels, deadly, laden with trips and traps and monsters and loot, but now using the newest version of the D&D rules.