Gardens of Earth

Imagine an alien life force that knows your deepest fear, and can use that against you. Corporate greed supported by incompetent surveyors leads to the colonisation of a distant world, ominously dubbed 'Halloween', that turns out not to be uninhabited after all. The aliens, soon called Spooks by military units deployed to protect the colonists, can adopt the physical form of an opponent's deepest fear and then use it to kill them. The colony is massacred and as retaliation the orbiting human nav