Siege of Serpentor — R.L. Stine

What begins as a hurried rescue mission for the G.I. Joe Team turns into a deadly game with Serpentor making the rules. Turning against his own side, the traitorous COBRA warrior has hatched a plot to oust COBRA Commander, destroy COBRA Island, and humiliate the G.I. Joe Team so that the world will turn to him for leadership. Not even Dr. Mindbender - Serpentor's own creator - can stop COBRA'S fiercest fighting force from trying to rule the world.