Dr. Pittendreigh's AN OBSERVER'S GUIDE TO THE EARTH'S MOON provides amateur astronomers with a helpful introduction to "moon hopping." As with "star hopping," which has long been practiced as a way of locating deep sky objects, "moon hopping" provides a careful instruction on how to move from readily visible lunar features to find the more difficult features of the moon. Each of the features in this book correspond with the Astronomical League's Lunar Observing Club.