Book excerpt: "Whether you're using traditional, direct current (DC) cab control or the latest Digital Command Control (DCC) system [this] will guide you through the steps of planning and wiring a layout. With ... more modelers choosing DCC, this book will help demystify how it works; clarify the advantages of DCC and what makes it different from DC control; and, teach you how to convert an existing DC layout to DCC. Step-by-step instructions and photos are coupled with clear, color-coded diagrams that will guide you through the process of wiring a complete layout or just troubleshooting problem areas"--