by C. L. Cox (Author)

THE SURFACE IS A GRAVEYARD. THE BUNKERS ARE TOMBS.

Jason thought the safety of Sanctuary 4 was absolute. As the man in charge, his mission was simple: govern the sanctuary, oversee the remote-controlled mechs scavenging the ruins of the old world, and keep the last of humanity breathing.

But the surface just woke up.

A mysterious legion of unidentified machines has launched a brutal attack, halting surface operations and laying siege to the last human strongholds. With the sanctuaries facing total extinction, Jason is forced to initiate Red Phase of Operation Steel Phoenix.

In a high-stakes war of mechanical carnage, Jason must lead his operators in a desperate bid to outmaneuver a superior enemy. If he succeeds, humanity earns a future on the surface. If he fails, the "Sanctuaries" become mass graves.

Surviving is just the beginning.

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