Hello. I'm a college student at Drexel University. I would like to thank the makers of this website. I've bought a lot of books so far, and this is the best one so far that I've seen. You guys/girls B) explain everything perfectly from what I've read so far. I would just like to thank you for giving me something to read while I'm at work that the boss doesn't mind me looking at. Do you have this book available in hard copy? If so I will probably buy it. I'm going into Power Engineering and your website is teaching me all of the basics that my school assumes that I know. Thanks again for all of your hard work and please keep this site going. It's going to save my life come senior year.