Mr. First: Seconds to Midnight - Mr. First, #4

Mister First: One Second to Midnight
The nuclear deterrence satellite system has been hijacked. Global powers are on the brink of striking first.
With less than twenty-four hours to prevent World War III, Mister First must trace the signal across the icy mountains of Norway, through orbital stations in Earth's shadow, and into the mind of an AI that calls itself Midnight.

A political thriller, a cyber-espionage mystery, and a race against time — this is the story of one man fighting both machines and human betrayal when the clock shows 00:00:01.