Good question about "why recommended".As far as I understand, this is a list of useful books. The two books I suggested above are used in Financial Math courses, thats why I recommended them.I don't know who recommendedbut maybe they read it (or parts of it) and found it useful. I think it is enough to have a positive opinion about a book in order to recommend itEarlier I mentioned that I have a long list of books. But I haven't read most of them, just read about them somewhere on amazon. So I've decided to post only the ones I've either read myself or know that other people are using them as textbooks.I have a few more, but they don't quite belong to the list