Solution Squared: The Final Equation

"...in this business, at some point, everyone dies."
Carl Santos
CIA Station Chief, Istanbul

Twin sisters Courtney and Whitney spent their entire adult lives traveling an inherently dangerous path - sometimes together, sometimes apart. It's a path that inexorably leads to a destiny that only they - together - can fulfill.

Over the years, they've made friends, and enemies - sometimes both in the same person. Even those they work against, respect their abilities.

They now find themselves forced ...