This is a good book. It's not a whole heap of plans for buildings - you can find those on the Internet - but more of a "here's how I did it" with plans and diagrams. It only illustrates one dome and one ROS so don't expect to be spoonfed 'how to do it' as you'll have to do work to modify designs to you own requirement. It's interesting as the author details not only what he did but also why things went wrong and how things were modified, which is great as it stops the inexperienced making the same mistakes. A good read *before* you start building!