This is a great little book. The author struck a good balance between basic knowledge (a refresher for me) and the meaty stuff required to think about a sensible approach to projects like this. The word THINK (emphasis mine) in the previous sentence isn't to be taken lightly. The web is top-heavy with solar photovoltaic "gurus" who are quite happy to sell you books, videos and pie-in-the-sky promises. The reality is different. I like the author's website, and the annual update. This book WILL NOT teach you how to build a PV solar panel cell-by-cell--nor does it touch solar heating. There are lots of free resources on the web and other books here for those challenges. It will, however, make you question everything about assumptions that you've made, and it also provides a counter-balance to the glut of mind-candy oaths peddled-about by the PV carnival barkers and snake oil types. This book will mature your thinking, as it shares "adult-eye" wisdom into the authentic promises possible in providing solar photovoltaic power to your business, home, cabin, motorboat and hoards of portable electronic devices. Keep up the good work, Michael!