^_^ He probably has some publications. I tend to like to start with scholarly summaries of psychologists before diving into the material. This is where I can sometimes hate psychology: Their materials are lengthy. LOL. They give an idea like Tolkien writes. Usually at least. So I'll read a section and go "wait.... they basically said...". So a summarized view tells me whether I want to find more material. Carl Jung is good to understand because Myer-Briggs material was built on his foundation.

https://www.britannica.com/biography/Carl-Jung <- I loved this summary. The 2nd to last describes his written works for later reference. By the way, his archetypes are cited by Joseph Campbell for example. :)