Physics of the Jovian Magnetosphere is a comprehensive reference devoted to the latest advances in Jovian magnetosphere physics. Spectacular discoveries by the Pioneer and Voyager spacecraft have led to an explosive development in the subject, with unprecedented coverage in both the popular press and the technical literature. Since 1974 no less than four special issues of Science, three special issues of the Journal of Geophysical Research, and special issues of Nature, Icarus, and Geophysical Research Letters have been devoted to Jupiter. Why all the fuss? The Jovian magnetosphere is simply one of the most exotic and interesting objects in the sky.