The Unseen Mandate. The Rourke Correlation, #5

The war is over. The serpent is dead. Caleb Rourke and Zane Maddox are supposed to be free. They are not. The woman who shaped Caleb's entire life is gone - but the machine she served has been running for two hundred years, and it doesn't stop for one man's grief, or his wedding, or his carefully built peace on the Virginia coast. When a silver key arrives with no return address, Caleb understands what it means: his father left something behind.
A seat at a table no one votes for. A debt that has been waiting twenty-three years for the right person to pay it. What waits for them in London is a ghost. What waits in Brussels is something older and more dangerous - a clearinghouse full of secrets that rewrites everything Caleb thought he knew about who his father was, and who authorised his death. And somewhere in the fractures of the Consilium Umbrae, a man named Kieran Ash is building a weapon.
Not a gun. Not a bomb. Something far more precise: a system designed to find the fault lines in the world's architecture and press, gently, until everything breaks at once. He believes he's saving civilisation. He has the patience of a man who knows he's right. Caleb and Zane have something Ash's models can't account for. They have a list of names - if they can reach it before the world ends on someone else's schedule.
The Unseen Mandate is the fifth book in the Rourke Correlation series: a thriller about inherited power, the cost of silence, and two men who have already lost everything deciding what they're willing to lose next. The Rourke Correlation: Book 5 of 6