Stalin's Folly: The Tragic First Ten Days of World War Two on the Eastern Front by Constantine Pleshakov

An excellent source for the first few weeks of the War on the Eastern Front. A few minor mistakes here and there (like saying 35,000 officers were killed in the purges, when in fact 35,000 were arrested) but overall it is an invaluable addition to the literature on the time period and events it describes. At times hour by hour accounts of what was going on, excellent descriptions about the problems units had in terms of communications with their superiors and subordinates as well as the devastation suffered by front line units and the useless counter-attacks and conflicting orders being sent out. Well worth the read.