By this point in time, I suspect that Steve Zaloga can write these booklets in his sleep, though I personally appreciate the time he takes to explain his archival research and sources; more of Osprey's authors should take this step. As for the topic itself, the overarching question is how essential were the AFV's Washington and London supplied Moscow, as opposed to the fleets of trucks that helped motorize the Red Army. Short answer: Anything that Stalin could get for the defense of Moscow was valued. Once domestic production ramped up again, American and British tanks fell in the category of nice to have but not essential. From there, Zaloga digs deeper in what the Soviet assessment of each type they received, and how the vehicles were distributed. Most interesting to me was that the single Allied type that was most appreciated by the Soviets was the Valentine, which was actually used as a scout. This was closely followed by the diesel-powered M4A2 Sherman, most valued for its automotive reliability, and a commentary on the lack of durability of Soviet wartime production tanks. ( )