I just finished reading this little booklet, and it's awesome. It's full of gameable content in little space. it follows a modern trend in RPG design of avoiding meaningless die rolls, and I like that. It has a clear root in old school Dungeons & Dragons and Into the Odd (wich I have not read, but I woould like to, based on what I saw here).
I have maaany RPG books, and I will definitely try this with a group.