I purchased the phsyical hardcover product through pre-order on River Horse's website. I contacted them about getting a digital copy and they sent me a free link to the drivethruRPG pdf. It's beautiful. The adventures are spot-on. Require thinking and player problem solving. This is going to be great to run for kids or nostalgic adults. It is it's own RPG system, but you can easily substitute your favorite system in here. Since there isn't really combat or death per se, you can really switch it up however you want. Want a dice pool system? Done.