DOOM GUY: Life in First Person is required reading for anyone interested in not just video games, but the creative process in general. It's not hyperbole to say that John Romero is one of the most important figures in video game history. Very few developers can accurately state they've assisted in creating new genres, and from Commander Keen to DOOM to SIGIL Romero has solidified himself as a monumental icon in the industry. But DOOM GUY isn't just about DOOM, it's an honest look at all the pivotal moments of his career.
https://screenrant.com/john-romero-doom-guy-life-first-person-interview/