Thanks! I'm more than a bit intimidated by these beasties (1k pages of his intellect for vol 1), but found his lecture videos captivating. Has been on my "should... but prolly never" list, but I can't fight a great deal!
Vol 2 is also at $5.99: Stalin: Waiting for Hitler, 1929-1941. https://www.amazon.com/gp/product/B01MUKXNVJ