Sad to know that... didn't know him but I think, in the past years, I've purchased a couple manuals from his website which I couldn't find anywhere else.
And, yes, 70 something is a bit too early to go.
That's very sad to hear. I've purchased several manuals from Rick and they are top notch. He had a immense collection of original copies in great condition to reproduce and if he had more than one copy he would sell those too. Rest in peace Rick.