Grain Into Gold is a very simple PDF with scarcely any artwork that sets about the daunting task of trying to teach you how to work your fantasy town's economy and the myriad of factors that will change it. Grain Into Gold is system-neutral, but accounts for many things that are likely to be common to standard fantasy rpgs. Grain Into Gold presents the subject matter in a very accessible way, and through humorous examples (that farmer thinks very little of John the Miller) and explanations in plain English, Grain Into Gold follows the fantasy economy from the Bread that sustains the peasant, to the cattle, and ultimately to the wizard's magic trinkets and the adventurers who covet them.

I found that the book did a very good job in keeping economics from being dry and unapproachable by using characteristics of settings we've all played in and concepts we're all familiar with. If you don't feel like constructing your own economy from the ground up, there is a base price list in the back. But this book is so much more than economics to me. It gave me a small picture of the struggles and triumphs of medieval life, a lot of ideas for campaigns (how's about a campaign around fighting dragons for their thingies to give to your wealthy wizard patron?).

While I ultimately can only recommend this book to real tinkerer GMs who like to play around with every aspect of fantasy worlds, I am certain even if not you'll find a spark of creativity from this book.