I always found rabbi kahane speaking better than his writing.
his writing is quite repetitive. One or two of his books that I read, he was giving examples from newspaper clippings, to show people what was going on. All the same message really, though I guess it was news at the time..
Aside from that, he had some brilliant insights and analysis that I had never heard before.
and of course his debates were brilliant..
He wrote books, and sefarim. His sefarim would be most interesting. The Jewish Idea, and his commentary on tenach - Peirush HaMaccabee (which he was murdered before completing)