I have numerous reference books but this is the first one to actually describe to me how the device functions. The "Before calling the...(technician)" feature was a brilliant idea and a potential money saver for most homeowners.
My son-in-law teaches middle school science and will be using this book for its wonderful schematics. My other reference books are stashed away on a bookshelf - this one stays on my desk where it is good and handy! |