Night of the Saucers

The saucers landed on Earth and the Vexxans infiltrated. Now they planned to destroy everything. It was Earth's darkest hour. Weak, backward, an easy prey to attack, it could only be saved by the Vigilantes. Sci-fi writer Thane Smith and his wive Miribel has the task of discrediting UFO stories. But how could they after running up against a playboy-monster who could only have been created by an alien race?