A grognard's return to the role-playing games of his youth.
i don't know much about D&D beyond the basics (was always more into Stormbringer myself), but i think the answer is 3, Dungeon Master's Sourcebook, Player's Book, and an Adventure Book, plus maps. that info and details about the modules are here:http://home.flash.net/~brenfrow/hw/hw.htm
Thank you, kind sir. I found a copy of the DM's Sourcebook somewhere, but wanted to know how much other stuff is missing.