This is a slightly. different version of alien invaders. A spacer who is a.fighter pilot tells the story of events. It starts with a battle of the Alliance versus the Commune. Then an unknown alien race appears and attacks both sets of combatants. Characters die. The spacer is downed. Contact with anyone, Alliance or Commune, is cut off. They need to get off the planet and jump to be able to let someone know that they need to prepare. But how? Definitely a good read/listen, with a great narrator!