This is a good introduction to how the energy from the sun can be put to practical everyday use. If you don't like to read a lot of technical stuff, this book is for you. Quick, easy reading the non-technical average person. with references for more information. This book has practical projects for the person who already has some knowledge of solar energy as well. If you're looking for a really detailed technical book of how to design and install your own solar collector (electrical or water), better get a different book. My 5-star rating is for those who are beginners or those that have a little knowledge of solar energy.