R.I.P.
Stephen F. Cohen
(Now I agree that Cohen was a very controversial writer and historian. But this book was, and is, very important to understanding the early Revolution, and where it all went wrong.)
https://www.thenation.com/article/world/stephen-cohen-obituary-russia/
Book:
https://www.goodreads.com/book/show/185209.Bukharin_and_the_Bolshevik_Revolution