As I’ve mentioned before in a post on the relation between If and “interactive fiction,” the process of publicizing If has made me aware of related genres and media with which I wasn’t familiar while I was writing the book. The earlier post noted the difference between a novel like If — where the reader makes a choice at the end of every chapter — and interactive fiction, a kind of text-based online game. The post noted that according to Wikipedia, the general category to which If belongs is not interactive fiction, but “gamebooks.”
Just as I discovered that there’s a thriving subculture devoted to interactive fiction (IF, not If), so it turns out there’s a thriving subculture devoted to gamebooks. The leading online resource (and the first result when one Googles “gamebooks”) is a site run by Demian Katz, Demian’s Gamebook Page.