I am glad you enjoyed my course, archmikhail. The last chapter of my text needs to be written. I will do that as soon as the department lets me teach H110 again. Birkhauser accepted it years ago, but we need a new contract. I could just sell it on amazon as an ebook, I suppose. I have gotten a flurry of emails asking for copies this morning. This is very encouraging, but I have to finish it before releasing it.