The Trinity Gambit. William Speir

The world is at war… again. Three regional wars rage across the globe. Only the United States, Canada, Greenland, Iceland, and the Caribbean island nations have yet to be dragged into one or more of the conflicts. But it is only a matter of time. Surrounded on all sides, and watching its allies fall one by one, the United States must not only determine how it will defend itself against the forces bent on complete domination, but how it can come to the aid of the few remaining nations that are still free.
As America’s political and military leaders contemplate the nation’s very survival, two members of the intelligence community uncover a terrible truth: the world is not embroiled in three separate wars; there is a single enemy playing a global game of chess behind all three regional conflicts—an enemy that the United States isn’t prepared to fight. How can the United States and its allies survive against such over-whelming odds?