The City and the Stars by Arthur C Clarke is one of my favourites and have only ever met one other person who has read it. Just reread it recently and it's even

The City and the Stars by Arthur C Clarke is one of my favourites and have only ever met one other person who has read it. Just reread it recently and it's even better and more relevant than I remembered. The 1950s was a particularly good time for sci fi I think.