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A fantastic alien city buried deep underground. What wonders - and what dangers - is it hiding?
Ryan and Regan Resnick are the two youngest members of the Prometheus Project, a top secret team exploring a vast, abandoned alien city. But when they journey through a portal to a primitive alien planet, what begins as an ordinary day will quickly become a nonstop fight for their lives.
Soon they are stranded on the distant planet, surrounded by vicious predators, and in the path of a raging river of lava. But surviving on the deadly planet might be the "easy" part. Because if they can get back to Earth, they will have to face a ruthless adversary who controls a mysterious alien device. A device that is the most powerful, dangerous, and unstoppable weapon the world has ever known . . .