I've enjoyed a 34 year correspondence with a very famous author. Is it okay if I take a few quotes from his letters and use them as blurbs on the back of my books now being published? Do I have to add something like, "From author's correspondence with"? The famous author says he just hasn't time to read any galley proofs. He also take six months to answer, so even if I ask him if I can use the quote, the book will already be set up. And calling him is out of the question! He has a secretary that runs interference -- I can't get to him. But he's as nice as he can be in the letters he's sent me. Any legal advice? Any warnings? Any "go aheads and let the chips fall . . . ."?