Orphanage
Mankind's first alien contact tears into Earth: projectiles launched from Jupiter's moon, Ganymede, vaporize whole cities. Under siege, humanity gambles on one desperate counterstrike. In a spacecraft scavenged from scraps and armed with Vietnam-era weapons, foot soldiers like eighteen-year-old Jason Wander-orphans 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.
Fiction, Science Fiction, Fiction, science fiction, hard science fiction
Robert Buettner