Many Hacker News users frequently reread the following nonfiction books: "Interconnections: Bridges, Routers, Switches, and Internetworking Protocols" by Radia Perlman for its timeless network engineering wisdom, "Antifragile" and "Black Swan" by Nassim Taleb for their insights into risk and uncertainty, "Lean Startup" by Eric Ries for its entrepreneurial guidance, and "$100M Offers" by Alex Hormozi for business strategies. These works significantly shape perspectives in their respective fields.