The Hour of Battle :

Step into a chilling future where warfare isn’t just fought with weapons—but with the mind. The Hour of Battle by Robert Sheckley delivers a gripping tale of suspense, set against the vast backdrop of deep space. As Earth relies on its last line of defense, the psychological toll of an invisible, telepathic enemy creates a slow-burning tension that blurs the line between paranoia and reality. A masterclass in speculative fiction, this story explores the depths of human consciousness, autonomy, and the cost of vigilance in a war you might not even know you're fighting.