I really like the basic map style and the mountains are very nice. Not sure about the forest, though. It took me some time to even see the forests! And I am not sure if the forest-style mixes well with the rest of the map.
Also, this kind of "bending the letters into form" you have going, for example with the Crystal Mountains, is kind of distracting to me.
Anyway, hope that does not sound too harsh. Just my first impression and my two cents.
Oh and please tell us a bit about your upcoming book!