Its chapter titles are:
1) Chances of an alien invasion
2) Warfare with aliens
3) Which aliens are friendly, which want us for lunch
4) Do we need to know?
5) Did we say hello, or are you our lunch?
6) Who's prepared, and who's preparing?
They feature alien types that are neutral or indifferent, as well as friendly and Utopian aliens and "Ringos" who want to attack us and loot the planet. Maybe the latter are like Stephen Hawking's space pirates and nomads, who travel from planet to planet plundering whatever they can use.
Edited by TheMcGuffin, 31 May 2012 - 05:00 AM.