I love that ever more authors go the route of hiring guilders to do their mapping for their books. Because that means a) more book with maps, b) more work for you guys and c) actually having good maps in books (kind of a corollary to a), if you will ).
I don't know these novels (at least so far) but i do like the map. A clean and simple style that is pleasing to the eye and i am sure also still looks good in a book (aka smaller and b/w). Good job!