I liked Fall actually, but I can imagine pure sci-fi readers being put off by the second part. It’s a 2-for-1 situation which brings together sci-fi and fantasy elements in interesting ways. But you’ll have to enjoy reading both genres or else it will be a slog.

As with all fiction books, my usual advice is to read it for pleasure, and put it aside if you don’t like it or it doesn’t live up to expectations. You don’t have to finish a book just because you started it.