The price of survival must be paid in blood.

For five months, the New River relief camp has kept tens of thousands of refugees from overrunning Flagstaff. Now it teeters on the brink of collapse.

In response, Mayor Gary Ruiz calls upon the newly formed Flagstaff Militia to defend the town and its dwindling resources. As an untested squad leader, Jenn must learn to inspire her troops while making impossibly hard decisions that bring into question how far she will go to survive.

All the while, in the ruins of Phoenix, a different kind of threat bides its time, waiting for the opportunity to strike.

As Darkness Falls is the fourth book in David Lucin's Desolation series.