Our knowledge of the Earth's field has developed over many centuries. Traditionally, the different aspects of geomagnetism, such as archeomagnetish, paleomagnetish, and the complex mathematics of dynamo theory, have been studied in isolation from each other. The Magnetic Field of the Earth draws together these major lines of inquiry into an integrated framework to highlight their interrelationships and provide a more comprehensive understanding of the geomagnetic field and its application to investigations of our planet's deep interior. Thereticians and observationalists will welcome the volume's unique approach.