Playing in existing fiction is fantastic, but a lot of us, at one point or another, get that itch to create a world of our own. So what makes them great? Not a formula, but the collection of ideas that makes up your mind. That's why this is not a step by step guide to creating your own wonderful world, but rather a collection of ideas to visit along your way, and ways to explore combining things you already love into something new. Matt Sernett, someone with extensive knowledge and experience with what makes a fictional world mean something, guides us through.