Well, I would love it if I could get further into it.  I really don't like Leonard Susskind as a person, but everything I have ever read for which he was the author has been absolutely wonderful. I don't know if he has lecture classes but if he does, he has to be as entertaining and as good at it as Feynman was. I find that I read and re-read each page to make sure I capture every idea he presents. That makes it slow going, but fabulously enjoyable for me. I missed out on discovering that I wanted to study the hard sciences and ended up being a CPA. Only much later in my career did I figure out that I had a mind for math, so I went back and got a couple of engineering degrees.  Now, Dr. Susskind is letting me play like I'm a physicist!  If I could just turn the clock back 45 years and start college all over!