This book provides an entry point for any modeler interested in building a narrow gauge layout. Narrow gauge railroads remain popular among railfans and modelers due to the spectacular mountain scenery in which many operated. Although narrow gauge layouts have a passionate niche following, there are very few books on this subject. • The book is an overview of prototype narrow gauge railroading as well as available models. • This is a one-stop book for introducing modelers to the subject of narrow gauge railroading. • It explains why and where narrow gauge railroads were built, how they operated, what their equipment was like, and why they were abandoned.