The Duplicated Man

[3] At war with Venus for decades, the Earth's military authority stood its ground.

However, a pacifist peace party sought to have a truce declared with Venus.

It was a peculiar stroke of luck that he found a human duplication machine.

But if he could just duplicate the right world leaders, essentially make extra copies of them, maybe he would have a chance bringing peace to Earth and Venus.

Floyd C. Gale of Galaxy Science Fiction rated The Duplicated Man three and a half stars out of five: "Deviousness of plotting and many thumbnail character sketches enliven the book".