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Blurb: “Can six men save America from four hundred million future invaders?
Don't miss this thrilling science-fiction story of six men, armed with only two weapons to save their country from annihilation. One, a radically new scientific discovery-the Ledbetter Effect-an atomic energy which can be controlled. The other-the determination of clever and intelligent Americans.
This is one of Robert A. Heinlein's most incredible stories of tomorrow, the adventures of a handful of soldiers of the future, fighting to save America from a deadly invasion.”