Inconstant Moon: Discovery and Controversy on the Way to the Moon," tells the story of NASA's robot lunar explorers, such as Projects Ranger and Surveyor, as well as the interpersonal relationships between some of the brilliant scientists who took America to the Moon. The exploration of the Moon is a story about tempers, rivalry, and scientific debates over the Moon's origin and surface features. Six years in the making, this book reveals some recently unearthed historical facts. "Inconstant Moon..." also contains rarely published photographs of some of the scientists discussed in the text as well as NASA images of the Moon and several lunar samples and meteorites. The book's appendices provide useful information for the interested reader or serious lunar student.