Nice work on the map and congrats on publishing your novel!

I think my main critique would be on the large white-ish coloured labels on the maps. Despite their fairly massive size, they're not actually that easy to read. In some places, there isn't enough contrast against the background. They also overlap other elements, and it's generally best to try to avoid that if you can (though often that's difficult or impossible). I feel your labels could have the same or even more impact if they were much smaller and in a contrasting colour. If it were me, I'd use small caps with a little spacing between the letters, and put the text on a curve. Obviously your tastes will be different, but something like than can indicate a large area on the map without dominating everything around it. Just a thought, anyway.

I'm really impressed by the amount of time you've put into this. Good luck with your book!