When C.G. Jung was in his late 30’s, he passed through what he called his creative illness. During this time, he composed a book concerning the content of his dreams. He mentions this book in his writings, but very few people have ever seen it; after his death, the family locked it in a vault…and so it has been under wraps for nearly 100 years.
However, for whatever reason, they’ve decided to release it to the public! This is the diary of one of the fathers of psychology as he passes through a psychological illness (he realised what an opportunity it was that he was able to observe the process and record it). The book itself is fantastic; it’s bound in red leather (he called it The Red Book) and looks like someone cross-bred Blake and Tolkien.
See a NYT article on the book and its release here or here is another shorter article