We may think we have an understanding about our planetary neighborsMercury, Venus, and Marsbut despite our proximity, these rocky, silicate-based planets still hold countless mysteries. Through a trove of images and a narrative bursting with detail, this volume imparts what is currently known about this small corner of the Galaxy. Curiosity about Earth and these three neighbors will be satisfied, while readers learn there is much yet to discover. Interesting sidebars allow for deeper comprehension and exploration.