One of my favorite authors and highly recommend his short stories [1] and the "ambiguous apocalypse" trilogy - The Drowned World, The Burning World, and The Crystal World. As one of collections intros said, Ballard is science fiction, but Inner Space, not Outer Space. 1. https://en.wikipedia.org/wiki/The_Complete_Short_Stories_of_...
It's perhaps fitting that Christopher Priest, one of the biographers, is the author of Inverted World, that might well fit in the "inner space" genre.