The Void Shaper - David Collins - Bog

In the first book, On Mars, Jason stumbled across the escape pod to a 3,500 year old derelict spacecraft. The AI for the ship then informed Jason that due to him having traces of alien DNA, he was now the Captain of a massive alien Starship. That 'should' have been good news. But the bad news was that Jason's DNA has an additional trait, one that shouldn't be there... The last time anyone had one of the forbidden DNA traits, it started the war that left the ship derelict. To fight the aliens that want him dead, Jason must become something from their nightmares...
The second book starts with the ultimate bad hair day (with fangs). The ship finally had a full crew and outfitted with the most creative weapons Earth had managed to develop. They take off to their first interstellar destination, a Mauron (Gorgon) shipyard that turns out to be run more like a penal colony. While their ship is in the repair bay, they get attacked by a state-of-the-art Felinog battleship. The Felinog were not counting on the unusual Earth weapons that had been added and some very creative tactics. Who is the Darkness? Who are the Claws? Where do Jason and his ship fit into their conflict? What new secrets hide beneath the strange ship they find in a world of darkness?
In this third book, now with over half the crew having transformed into aliens, they need to escape from the void prison that they accidentally created. While stuck in another dimension, they manage to pick up several new alien refugees. If they screw it up, they will be stranded a very long way from home, a home where the Fenilog is waiting for them. Having failed to kill them the last time they met, they have scheduled a jousting match with starships. The battle will be between the Medusa, the patched-up former derelict ship of Jasons, using historical Earth technology, against the most advanced weapons the Felinog have yet come up with.
Jason has discovered that he can create strange shapes out of several different voids. He knows that solving this puzzle will give him mastery of the void portals. That will be needed to escape from the void prison. But what are these shapes, and why do they completely terrify everyone that has seen one, except for Jason?