This Atlas is not what it should be. If fate had been kinder, each of the four planetary bodies represented here would have had its own Atlas, each larger than this volume. Don’t blame the author, though; the culprit is an elegant yet critical device called the HGA, explained in Chapter . Should you pass over this book on your way to the used “pilates-at-home” bookshelf or toss it in the recycle paper bin? I hope not. Despite its shortcomings, this Atlas is the most complete representation we will have of the surfaces of Jupiter’s large Galilean satellites for the next decade, objects that should be called planets,.