David Cook wrote a book. That book is a technically a Cook book, but we won't call it that. We'll call it Intermediate Robot Building (no, we don't have it yet, we're still waiting for our order!), and it heavily features the Roundabout Robot.
If you're familiar with Mr. Cook's first book Robot Building for Beginners, you'll know how much detail he gets into. What we now have is a collection of PCBs and the microprocessor needed for building this project, available as a bundle, or individually (do a search for "roundabout" in the search bar).
These parts and pieces are not complete bundles, but we're looking into what we can do to make it easier for you to get most of the necessary parts.