By Bryan Appleyard
The Sunday Times - Review
Since June 24, 1947, when a businessman called Kenneth Arnold saw a squadron of alien spaceships in the Cascade Mountains in Washington state — generally regarded as the first authentic UFO sighting of the post-war era — aliens have poured from the abyss that lies between ourselves and the world.
We know them well. They are the grey aliens with slanting, black eyes and vestigial nostrils whose corpses are kept at Area 51, a secret military base in the Nevada desert. They are the tall “Nordics” who gently oversee complex surgical procedures on human abductees. They are ET, the Borg, the Klingons and the Vulcans, the Pleiadians and the Nine . . .