The Third World War is a novel by Sir John Hackett of a fictional third world war between NATO and Warsaw Pact forces breaking out in 1985, written in the style of a non-fictional historical account. It was written in 1978 as a wake up call to NATO.

Early in 1977 a retired NATO general called together six of his collegues — including an admiral, an airman, an economist and a diplomat — to write a dramatized game-plan for the next world war. A sensational international bestseller, it is a vivid, detailed, and often blood-curdling on-the-spot report from the battle fronts of a "real war", from tank assaults to air clashes to ICBM launchings, based on an insider's knowledge of weaponry and actual NATO and Soviet battle strategies. In the light of changes in Eastern Europe the question now is: Could it ever have happened? Could it ever happen again?

This is a novel by Sir John Hackett of a fictional third world war between NATO and Warsaw Pact forces breaking out in 1985, written in the style of a non-fictional historical account. The book was published in 1982.