Hi Linda,
I never heard of Arthur Robinson.I won't pass judgement as
who knows what went on?
I read that Linus Pauling helped Patrick Holford found the Institute of Opt.Nutrition in 1984.

I have many of his many books,some of them are co authored
and I find them really brilliant.
i've met him and believe in my heart & soul that he is a truly outstanding man who is in it for the good of mankind and not to line his pockets.He has alot of time for people.
If you want a good start is the "optimum nutrition bible",like a general summary (extremely detailed &informative)

The newsletter might be good idea as it will be up to the minute info.Rather than waiting for an update of his book...