Well I usually end up loving Frank's books or just not connecting with them. This one fell into the not connecting part. There was nothing horrible about it- in fact some parts were quite good. However, why all the world building and descriptiveness if this is a stand alone book? I got invested in some characters that I will never hear a story about.
I loved Ruele but didn't really care for Mystique. She was just kind of ho-hum for me.