running periodic discounts on the different PDFs for Harn. There is a particularly good deal on the Harnworld Master Module for $5. Now what this is a series of articles that provides an overview of the Island of Harn and it's history. It's companion is the Harndex which is a mini-encyclopedia of one paragraph entries on the various locations described in the Master Module. Of course the articles, like this one for Peran, flesh these locations out in far greater detail.
Finally Harn articles are designed to be placed in three binders. So if you were to print the PDFs out and punch them, you would get what Columbia Games sends out in print.
Note that the City of Coranan, the largest city in Harn, has a discount as well. Finally if you want to use the linked to take advantage of the discounts make sure you go to the last post to get the latest. They generally expire in a week.