Genre labels sometimes argue with one another, and here they do. Survival Line sits across science fiction, fantasy and general fiction on our shelves. The defensible reading is speculative survival: a story about staying alive under conditions the ordinary world does not supply, which is a wide enough tent to hold all three tags without strain.
The writer behind it has no public record we can responsibly draw on, so this remains a page about the book. Happily, the book has done the arguing itself. It has attracted a healthy volume of listener ratings and holds a solid average, which for a title without a famous name attached is by far the more meaningful signal.