I just learned about Mackay's lectures on YouTube and am working through the same. Outstanding teacher. I was so sad to see he died shortly after the course wa

I just learned about Mackay's lectures on YouTube and am working through the same. Outstanding teacher. I was so sad to see he died shortly after the course was recorded. He has a gripping/heartbreaking chronicle at https://itila.blogspot.com https://itila.blogspot.com