The History of Western Philosophy is excellent, but is there a detailed study of Bertrand Russell's own contribution to philosophy?
Bertrand Russell became famous as a mathematician, logician and historian of philosophy. But he himself had a very specific view of the problem of philosophy. I would like to know how modern philosophers view Russell's contribution to the discussion of the "final questions of being", and not build their own amateur guesses on this subject.
As an old man, I will add the book by I. S. Narsky “The Philosophy of Bertrand Russell” . You can also see A. F. Gryaznov's” Analytical Philosophy ”  — there is a section about Russell.
All that I know in Russian is Kolesnikov's book The Philosophy of Bertrand Russell.
In English, of course, you can collect a whole library.