Apologies. I omitted to respond to your ealier post.
I have never considered an index, partly because the series is nowhere near finished and partly because I doubt whether Jun has the resources to mount an index for the columns in the format he uses for the columns in the forums.
Of course, I can see the value of an index, but I am actually revising some of the earlier columns and so they are now somewhat out of date.
Don't expect to understand it all on the first read. To really understand it you must read it over and over and over again and at each reading you will gain a little more understanding. It is a lot like practicing Aikido.
P.S. It would be nice to have an index for future referencing.