This one has always been one of my favourites, even if nowadays such a statement might sound somewhat cliché… but I don’t mind.
It gave me a somewhat disturbing experience including disbelief and shivers at first contact (way some decades ago), nowadays not so much…
A visionary book by a great author, whose other works btw have been sadly overlooked by the majority ever since.
Yet there have been, and still are, many other great writers out there, and, if you find the time, well take it, and recommend them to us.
If there is any “legally available” free online version existing, please add that to your personal recommendation as well.
Metro 2033 and Metro 2034 by Dmitry Glukhovsky… That also pretty much sums up the books I’ve read, I don’t really like to read unless it’s something I’m really interested in.