1984

From the introduction:

In 1949, George Orwell shared with the world a vision of a future gone wrong. A world dragged through the second world war and directly into the Atomic Wars. A world where nations as they were previously known were eradicated, replaced by a trio of power blocs known as Oceania, Eurasia, and Eastasia. Between the three of them they encompass the whole of the globe, and there is no cold war, no nuclear missiles waiting to unleash hell – that already happened, after all. Instead they fight a perpetual war, alliances with and against each other shifting by the week, sometimes multiple times per day.