Underworld by J.J. Green

Author J.J. Green brings us Jas' next adventure. Picking up after Jas and the others rescue Sayrn from the Shadows they find that the plane that they've taken has been taken over by Shadows. They take the shadows out but end up having to walk the rest of the way to the spaceport but they end up walking through the underworld of the planet and meet people who've broken away from modern society. The underworlders help them and the navigator falls for one. This is a great fast read and one that I highly recommend for all science fiction fans.