I have, so far in my lifetime, only read 3 books all the way through more than once. One was the Bible, one was 'Men are from Mars; Women are from Venus' by DR. John Grey. And the other was this book. At the time of my first reading, I had an eye infection and was advised by several people not read... but I just could not put this book down. It has 'infected' me with a great urge to learn more about pendulums, which I am in the process of. I was lucky enough to be able to get the pendulum to work the first time I tried, but others may not be as blessed. The book describes many uses for a pendulum, as well as several examples to practice your pendulum skills with. There is not a lot of glitz in this book, which may turn some off, but I found it a very informative and interesting read.