Book excerpt: In this lively guide to the Gettysburg battlefield, Carol Reardon and Tom Vossler invite readers to participate in a tour of this hallowed ground. Ideal for carrying on trips through the park as well as for the armchair historian, this book includes comprehensive maps and deft descriptions of the action that situate visitors in time and place. Crisp narratives introduce key figures and events, and eye-opening vignettes help readers more fully comprehend the import of what happened and why. A wide variety of contemporary and postwar source materials offer colorful stories and present interesting interpretations that have shaped--or reshaped--our understanding of Gettysburg today. Each stop addresses the following: What happened here? Who fought here? Who commanded here? Who fell here? Who lived here? How did participants remember this event?