Earth is an alien civilization’s experimental training ground, and Ethan is caught in the middle of it.

The experiment’s final stage is here, an apocalyptic Swarm ravenous for biomass and Psy. Its arrival wakes a dormant extraterrestrial artifact that seizes Ethan and transforms him into something more than human.

Phase Titan—the title means nothing to Ethan or his scientist companion. But to the alien babe he finds fighting the local warlord the Titans are legendary warriors, a myth that she came to Earth chasing, and the only hope for stopping the Swarm.

He has the tools to get it done—weapons that channel Psy, a bioengineered body unlike anything else on Earth, and an alien ship filled with cutting-edge technology. As strong as Ethan is, he can’t do it alone. He needs companions known as Harmonics to shape his Titan power and keep him sane as he carries a burden he never asked for.

But before Ethan can save the world, he’ll have to survive. The local militia aren’t making it easy. They’ve found Ethan’s base, a secret government lab, and put it under siege.

And worse lurks within the militia’s ranks than raiders looking for spoils—things that aren’t entirely human anymore. Things that only a Titan can stand toe to toe with. Luckily for Earth, Ethan is just the Titan for the job.