Look down into the streets, the buildings, the parks. There is your battleground. Down there is the enemy - an enemy who wears no uniform. He walks behind you in the street, sits with you when you eat and perhaps swims beside you in a public pool. He may ask you for a light, sell you a flyer, or in another form, leave the smell of perfume on your pillow. The enemy is young and old, male and female and he is everywhere. Could such a situation arise... or has it already arisen?A world at war . . . But the enemy is unseen, unknown, so deeply under cover that most of the population doesn't even know they exist. A classic science fiction novel by the author of INVADER ON MY BACK and THESE SAVAGE FUTURIANS.