Unnatural Crypsis

Sometimes, you have to take the fight to the enemy. Even if they're hiding in a perpendicular universe.

Dek Conrad's unseen enemy travels to other universes at will. Apparently unsatisfied with menacing just our universe, they intend to destroy intelligent life in all universes. 

To stop them, Conrad forged an unlikely alliance with a colony being who knew a lot about their enemy. An awful lot. Too much? How can he judge the motivations of a being that looks so human, yet is anything but?

This perpendicular universe might hold the key to defending his people and all human life. Or it might be an escalation in a war he's already losing. At this scale, a single mistake could have serious consequences — including the extinction of the human race.