Han var en fortaler for bæredygtig arkitektur og skrev meget om emnet. Hans bøger inkluderer:
- "The Greening of Architecture:A Guide for the 21st Century"
- "Det nye grønne hjem"
- "The Sustainable Home:Living Green in the 21st Century"
- "The Practical Green Building Guide:A Practical Guide for Design, Construction, and Operation"
- "Grøn boligforbedring:100 nemme måder at gøre dit hjem mere energieffektivt og miljøvenligt"
- "The Architecture of Green"
- "Greening by Design:Sustainable Home Architecture for the 21st Century"
- "Design Green:Sustainable Home Architecture for the 21st Century"
- "The Energy-Efficient Home:En komplet guide til at bygge og renovere for maksimal energieffektivitet"
- "The Green Building Bible:A Complete Guide to Sustainable Design and Construction"
- "The Green Home Construction Handbook:A Complete Guide to Building and Renovering for Energy Efficiency and Sustainability"
- "Bæredygtig boligarkitektur i det 21. århundrede"