Fremder by Russell Hoban

Set in a futuristic universe where space travel is commonplace, the story follows the protagonist, a space pilot who survives a mysterious explosion aboard his spaceship. As he grapples with the trauma and confusion of the incident, he becomes embroiled in a web of intrigue and conspiracy that challenges his understanding of reality and identity. The narrative delves into themes of memory, perception, and the nature of existence, blending elements of science fiction with philosophical musings, as the protagonist seeks to uncover the truth behind the explosion and his own fragmented memories.