The Shattered Veil (Gideon Wolf, #5)

The Darkness Is Growing. And You're Helping.

When Gideon Wolf breaks into a GenTech biotech facility outside Nashville, he expects to find a weapons program. What he finds instead is a kill box with thirty-four men waiting inside it, a sacred symbol he can't identify, and zero answers about who sent them.

The symbol leads him to a centuries-old mystery school called the Ignis Custodium, devotees of a cosmic force that runs on human anger, fear, and hatred, and they have figured out how to manufacture all three at industrial scale. Their weapon of choice is not a gun. It is a frequency device that doesn't kill guardians. It just makes Gideon's red mist lie to him.
That's a problem.

The trail runs from Nashville to Washington D.C. to London, Berlin, Vienna, and finally Munich, where the cabal plans to complete a convergence ritual decades in the making.

Gideon's bond with the ancient god Xolotl makes him almost impossible to stop. Almost. But his closest ally has been taken, his most reliable instinct has been compromised, and somewhere in the dark a being older than either of them is offering him a way out he didn't ask for.