Call of the Star Dragon — Blaze Ward

Six hundred and twenty-seven convictions later, the career criminals Morty and Xiomber have seen the light and joined the good guys. Gareth must go undercover to stop his nemesis from unleashing another crimewave across the Accord of Souls.
While the leaders of the Accord of Souls send an agent to Earth to stop its top scientist before he can open the way for the rest of humanity to flood into the galaxy.

“Call of the Star Dragon” is the third Star Dragon story -- science fiction written with an 1950s pulp flair -- and the continuing adventures of the Star Dragon and the Accord Constabulary into the world of underground weapons development and espionage. Be sure to read “Birth of the Star Dragon” and “Call of the Star Dragon” first, and be on the lookout for “Shadow of the Star Dragon” to read next.