I learned it OTJ at HP. There was a "UID" or User Interface Design group there we worked with. They were the group that invented green/purple keyboard/mouse m

I learned it OTJ at HP. There was a "UID" or User Interface Design group there we worked with. They were the group that invented green/purple keyboard/mouse mapping and similar mapping with colored traces mapping to colored controls and colored cables for oscilloscopes back in the 1990s. There are references that were involved in that but none individually nor as ensemble is a "systematic" source. So they wouldn't really fit your requirement. These range from Card & Moran to vendor design guidelines to general industrial design concepts. You will learn the most by "doing" and solving real problems. Honestly half the issue is looking at customer use-cases and testing with customers which is the ultimate source. Doing it in a vacuum or from arbitrary recipes generally doesn't work. Customer. Customer. Customer. My current company has a number of beta customers who are willing to try things due to long-term friendship combined with a modest discount on the first copies they buy. They are our guinea pigs and our inspiration for both problems and opportunities both for UI/UX but also intimately tied to product features.