This book is a fairly concise guide of good things to have on hand for the average family. It is not for extreme preppers, which is great in terms of being usable for someone just wanting to be prepared in case of an emergency like income loss, supply chain interruptions, or certain natural disasters.
As for the actual suggestions, I enjoyed the super foods and vitamins and minerals additions. Most of the food was pretty self explanatory and common sense ones to have on hand, but perhaps it would be good to see in list form for those who have never stored more than a weeks worth. I wouldn't really call it scientifically proven, as the title states, and I find some of the data used to be a bit impractical, serving size rather than 100 g would have been more useful. Cereal really shouldn't have been a recommendation for nutritionally sound breakfast. Dessert? Sure. But it drives up blood glucose levels more than desserts for many individuals, so not the best option if you are trying to stretch food out and for its size. Blood sugar spiking and dropping will necessitate eating more in the long run. I would also recommend not storing crackers for long term storage. Many varieties, like wheat thins, tend to go rancid quickly. Same for pretzels and chips past their best buy date. Most of the other items mentioned will last for a decent amount of time, though I would still recommend rotating. Since pest issues can be an issue and not everybody has space for big sealed storage buckets, high fat foods like chocolate, flax seed, and chia seeds should be in some kind of sealed container so that they do not attract and become a food source for rodents, who love high fat food items like that. It was not mentioned in the book, but I would hate for anyone to be reading this book and putting back some extras for their family, only to find a critter has gotten into some of it.
I would probably skip this if you have any experience or read other books on the topic, but it is decent overall for a complete beginner.