An excerpt from the INTRODUCTION:

" WHAT IS DOWSING?
Dowsing is an art and science that creates a bridge to the subconscious mind through the use of a pendulum or other instruments/tools. Dowsers are able to use that bridge to gain access to information not normally available to the waking consciousness.

" HOW DOES IT WORK?
Energy can be thought of as an essence, and its various manifestations can be thought of as its uses or applications. For instance electricity is the essence, its application or manifestation is the refrigerator, computer or vacuum cleaner. Energies around us can influence us in different ways. For example, positive or negative thoughts can manifest as happiness or sadness, or physical sensations, such as pain or pressure, which can make us feel well or not well. For most of us, these energies are invisible to the naked eye, but we experience their tangible effects."