If you in the mood for an audiobook/ podcast series, I thoroughly enjoyed Dan Carlins 'Ghosts of the Ostfront"
He is an incredibly vivid storyteller.
http://www.dancarlin.com/product/hardcore-history-ghosts-of-the-ostfront-series/
Try his World War 1 series for free if you want to check him out.
http://www.dancarlin.com/product/hardcore-history-50-blueprint-for-armageddon-i/