I have done it - PSM III exam is passed. Before that I have passed many other exams, but this one was the most difficult for me. I have posted it on LinkedIn, what effect in that many people have asked me how I had prepared, what kind of books I have read etc.
Below you can see a part of the books, which I have studied. Please be aware that I have read as well blogs, articles from PST and watched videos on Scrum.org Youtube channel.