This is quite an inspiring book. It reviews many different types of environmentally low-impact homes, both traditional and modern in different climates around the world. It discusses building forms, materials, ventilation, various types of renewable energy, and water conservation. I actually found the most interesting chapter to be on lime and low-energy masonry. It's well presented and all fairly clear and understandable. There are lots of graphs, pictures, diagrams and tables, but few horrible equations. I wonder what an architect working in the UK would make of it, as a lot of the examples are in foreign countries with different climates and different building regulations. It doesn't really address such problems as complying with LRegs and SAPs. I'm guessing a professional will need to have read some duller books before being able to put the theory into practice. Maybe that's an unfair criticism because I see it has good reviews from architectural magazines. I suspect the book is aimed more towards students, and for them it would be an excellent introduction. I suppose it may also be useful for people interested in refurbishing their homes to make them greener (if they have a lot of money).