Written by author Jason Wallace (Cooking with Class), The Knowledge Check product line is a collection of rules and information designed to add a little knowledge to any fantasy campaign.
The Roleplayer's Leechbook contains an informative breakdown of historical medicine, surgical procedures, and common and not-so-common treatments for ailments, as well as a collection of adventure hooks, places and locations, and even magical items.
Buy now for only $1.99 (http://www.rpgnow.com/product_info.php?products_id=57099)