This book investigates the evolution and impact of British railway locomotives throughout history. Alan Bloom, an established author in railway history, draws upon extensive archival research and technical specifications to present a comprehensive overview of locomotive development. The work argues that the design and deployment of these engines were intrinsically linked to Britain's industrial and economic progress.

This work is recognized as a solid, if somewhat dated, reference for enthusiasts of British railway history. Its strength lies in its detailed cataloging of locomotive types and their historical significance. While newer publications may offer updated perspectives or more extensive visual material, Bloom's foundational research remains valuable for understanding the era.