Yes Harry's mentor Saul Alenski.

I was looking at it on Amazon and was reading some of the evaluation of some readers.
One guy wrote a rather long review. I'm not into cut and pasting the whole article (that's Harry's schtick😉) but I will post his closing paragraph-

"What I found quite amazing after reading "Rules for Radicals" is that I feel that I had stumbled upon THE liberal playbook. It is quite easy to look back at the lead-up to the elections of 2006 and 2008 and see Alinsky's handiwork. But, I find myself wondering if the "radicals" now in charge have unwittingly positioned themselves to be victims of their own game ... I guess that answer may come in 2010 and/or 2012."

I think his dates were off a bit, but he was close...