Solar Water Heating is the first book I’ve seen that focuses solely on solar water heating. It’s a technique that’s been practiced since ancient times, but until now there’s been strangely few resources on the topic for a North American audience. The author, Bob Ramlow, examines state-of-the-art solar heating systems. He covers not only solar water heaters, but also solar water and space house heating systems and solar pool heating systems, including their advantages and disadvantages. Since people often get turned off by the up-front cost, the book focuses especially on the financial aspects of solar water or space heating systems, and shows that such systems can save significant costs in the long run.
It’s available from Amazon for $16.47.