It's a gentle - and to my eyes effective - introduction and overview on a topic many people have heard about but most have probably not really read or considere

It's a gentle - and to my eyes effective - introduction and overview on a topic many people have heard about but most have probably not really read or considered further. It wasn't just meant to be a "look at old vs. new map" - it had a lot more context and information than that compiled for personal relevance and easy of understanding.