I don't know what they're talking about with "available only in hardcover". Hypermedia Systems is here: https://hypermedia.systems/ https://hypermedia.systems/

I don't know what they're talking about with "available only in hardcover". Hypermedia Systems is here: https://hypermedia.systems/ https://hypermedia.systems/ available in HTML online, ebook format, hardcover, or you could go to the github repo and probably transform the source into whatever format you want: https://github.com/bigskysoftware/hypermedia-systems https://github.com/bigskysoftware/hypermedia-systems X posts as screenshots suck though.