The Vampire Underground wraps up a four-book set that I originally began in 1997. My son, James, asked me to write a book for him since I had written one for his sister. I said it could happen and began working on Journey to Mars. Much has passed under the bridge since this series began and I'm satisfied to finally have it completed...maybe. I am thinking there might be a fifth book in the series. Maybe to set the Denebians straight. We'll see. In The Vampire Underground the conflict between Jason Martin and Marsella comes to a head and is finally resolved. Marsella wreaks havoc upon the Earth and Jason and company must go to great lengths to stop her.