Shadow Worlds — Justin Sloan

Now I have become Death, and my shadow shall consume worlds. Samantha continues her journey with the Shadow Corps, an elite group of the universe's most deadly warriors. They must stop the other two ancient guardians turned evil, the space dragons, in order to find out who is really behind this upsurge in the enemy's power. Once again she must come out swinging, to bring destruction to evil that lurks in the darkest corners of the universe.