Great book - a lot of useful ideas, well illustrated, about an overdue trend in architecture and building engineering.
As the author and others have noted, most of us would not go for the idea of buying cars via a process of having piles of parts shipped to our driveways, then bringing in crews from assembly lines to build the cars on-site, out in the weather, leaving scrap everywhere that needs to be cleaned up, or buying major appliances in a similar way. So why do we still have our houses built this way, when we could also get them built in major sections in climate-controlled factories, then quickly assembled in their final locations?
This book - first in a series - explains the process in more detail, and makes clear the difference between prefabricated houses and mobile homes, a.k.a. trailer homes. The rest of the book is made up of sections covering prefab houses in a variety of styles suited to different environments and needs. If you're looking at options for home construction, I recommend including this book in your research.