Arcologies are a favorite Sci-Fi genre interest of mine. An Arcology is a kind of a Utopian idea of a completely self contained city housed entirely within a single building. There are many great Sci-Fi novels about arcologies. My first read and probably favorite is Oath of Fealty by Jerry Pournelle and Larry Niven. Oath is about a society that trades privacy for security in a gigantic self contained building city. Definitely a novel who’s ideas have stayed very relevant.