I bought this book and we are actively building the easy cellar. It is not quite as low cost as he states with todays inflation, but this book is WELL done. Explanations, pictures, exact measurements, and many helpful video links. It is a low cost cellar. We plan on using it as a root cellar/nuclear fallout shelter. And it’s easy to understand/accomplish. Not high tech or high cost but I believe effective. Just my opinion. Worth the money!!