In the fifth installment of James Patterson's action-packed Daniel X series, Daniel must now face an alien whose origins appear nearer to the depths of Hell than the outer reaches of the galaxy. Number Two is an unstoppable criminal that's slowly been amassing an underground army of disgusting, disgruntled, and dangerous aliens to help him enslave Earth's population. And it's all in preparation for the arrival of Number One, the most powerful alien in the universe and Daniel's arch-nemesis.