At the beginning of the audiobook, there's an announcement that you can view the maps mentioned in the text by going to the author's page at the Harper Collins website, but the download doesn't seem to be working: www.harpercollins.com/pages/thecartographers

Fortunately, there's an e-book sample that let me view at least a small version of the NYS map.

Still, it would be cool to get a better look at it. Maybe I should email them.