Hi all, I'm thinking of eventually working on Prokofiev's sonatas 6,7,8, commonly referred to as the war sonatas. Before doing so, I would like to do some serious research on the background and motivation for these works, as well as Prokofiev's life in general, particularly his political/social views, hopefully to discover some specific aspects of 1939-1944 Russian politics influenced these sonatas.This will be a long project, but I would like to get started. Hopefully you all have some suggestions of essays/books or online references that could get me started. Interviews/masterclasses that delve into the motivation behind these compositions would be great too.