Ok, i love the idea of this guide, but I don't have any guides for how to read it. Your comment helps, but should the map have a legend explaining colors, size and distance? And are the axis significant?

I got almost all of them from the local library. I got them on CD, but they also subscribe to a couple audiobook suppliers that allow you to download and listen.

I loved this series. I happily used a credit (Libro) for the one full novel in the series