A few years ago I noticed that every bookseller I spoke to at Elliott Bay Book Company recommended Ready Player One, Ernest Cline’s novel about a kid who lives much of his life in a virtual world designed by a 1980s pop culture-obsessed game designer. I read it in a few sittings and enjoyed the hell out of it. It had what I like to call idea density–a steady flow of new information that kept me interested the whole way through. The pacing was tight, the protagonist easy to like, and the cultural references continually pressed my Gen X nostalgia buttons. If you pay attention to the goings on in the VR industry, you’re probably aware that Ready Player One is given to every new hire in Facebook’s Oculus division, and that Stephen Spielberg’s adaptation hits theaters in a year or so. It’s a wildly popular book.