I also read this. very good. would love an extended food sample trip sometime, preferably by train.
I highly recommend this book
Taste of War: World War II and the Battle for Food
outstanding account of food in WWII, specifically in England, Germany, USA, USSR and Japan. what was eaten, government policy, military rations. some real horror stories. several times the Japanese lost more troops to hunger (and related malnutrition etc) than battle losses.