|Other Retailer||Price Checked Time||Their Price in AUD||Our Price|
|Amazon UK||yesterday||36.12||$24.70||You save $11.42|
|Amazon US||2 days ago||30.29||$24.70||You save $5.59|
|Book Depository US||today||27.86||$24.70||You save $3.16|
The author is a world leading expert on solar power generation and has worked with many types and sizes of photovoltaic systems. He constructed his own "Green" solar powered home and has worked for world leading companies in solar photovoltaic power generation. He has commissioned the USA's largest solar photovoltaic utility power plant and also the largest thin film solar photovoltaic system of its type in the world. He discovered the "Archimedes Death Ray" effect that occurs in architecture and unnaturally high levels of solar radiation in modern human society.