A simple breakdown of the core mechanics of a tabletop role-playing game and allows for the reader to then take this basic premise and explore their own world.

The book is great as supplemental material when looking to create new characters, items or locations in a d20 system by helping the reader understand statics in a simple comparative form. Or it is a good starting point to learning what it takes to build a game from scratch and to make the game, as they say, "not broken."

Whether you are looking to create your own world, or just add to your favorite system, this material is a good source to have on your desk.