Mr. Spaceship by Philip K. Dick, Science Fiction, Fantasy, Adventure

In a distant future, humanity battles the Yuks, an alien race that employs living organisms instead of traditional technology for warfare. Despite the prolonged conflict, humans struggle to counter the Yuks' unique life-form-based vessels. The breakthrough comes with the creation of a brain-controlled spacecraft, leading to the emergence of an unexpected entity named Mr. Spaceship. This development promises a new dimension in the war, blending human ingenuity with unforeseen consequences.