Robert Yang is the founder of this project. As an indie game developer, he is most well-known for his Radiator games about sexuality and intimacy. In the past, he also contributed levels to projects like Black Mesa Source, and conducted interviews with level designers for Rock Paper Shotgun. (https://debacle.us)
Contributors ...
Andrew Yoder has worked on Paladins and Warframe, and specializes in multiplayer social spaces and combat design.
I clicked into the Overview from the Book menu in the main nav. That only shows the sections in "Book 1, Process", not books 2-4 and the appendix.
Overview took me into the content, which has a sidebar; I scrolled to the bottom of that and found the link to the page. It took me a moment to realize it did show that info about the author/contributor.
I agree it should be easier to find, e.g. an About link in the main nav.