Glenn has been a freelance technology journalist since the 1990s, having written for the New York Times, Wired, and the Economist, among many others. He currently contributes regularly to Macworld and TidBITS, writes books in the Take Control Books series, and is an independent printing and type historian specializing in the print materials that make up comics history. A former Amazon employee (1996–97) who used to eat burritos with Bezos, Glenn is more interestingly a two-time Jeopardy! winner.