John Brunner 
Give Warning to the World [EPUB ebook] 

Are there aliens among us? Are the chariots of the gods returning? If so – are they for us or against us? John Brunner, award-winning author and science fiction writer extraordinary, takes the questions now on everyone’s mind, and gives one possible answer in this startling novel. Here is an edge-of-the-seat story of the man who discovers that the vanguard of the aliens are indeed amongst us – and that the human species has but a few hours left before our time runs out. It’s a science fiction thriller you won’t be able to put down.