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A good story, reminiscent - in a good way - of Heinlein's "Starship Troopers."

This and the sequel kept me up late at night. A fun read, hard to put down.

Mankind's first alien contact tears into Earth: projectiles launced from Jupiter's moon, Ganymede, have vaporized whole cities. Under siege, humanity gambles on one desperate counterstrike. In a spacecraft scavenged from scraps and armed with Vietnam-era weapons, foot soliders like 18 y/o Jason Wander-orpahns that no one will miss-must dare man's first interplanetary voyage and invade Ganymede.

They have one chance to attack, one ship to attack with. Their failure is our extinction.