This was really well written in a way that was fun to read. I found it interesting to learn about how the grocery store and its contents have evolved over the last 100 years. Some of the information was obvious but not something I really considered. Until reliable refrigeration was invented, there weren't dairy cases, nevermind the 20 foot section of yogurt varieties. The produce section is the most shopped and best profit for stores, which is encouraging. There are over 40,000 items in the average store. I could go on and on. I like that it also covers Amazon and predicts how another big change is coming to how we buy our groceries.