This book investigates the operational history and technical evolution of the London and North Eastern Railway (LNER) steam locomotives during the pivotal period of their existence from 1923 to 1948. H. C. Casserley, a noted railway historian, draws upon extensive archival material and photographic evidence to present a comprehensive overview of the LNER's steam locomotive fleet. The work details the design philosophies, operational challenges, and eventual legacy of these iconic machines that shaped British railway transport during the interwar years and beyond.

This work is recognized as a detailed and authoritative account of LNER steam locomotives, appealing to railway enthusiasts and historians alike. Casserley's meticulous research and extensive photographic collection provide a valuable resource for understanding this significant era of British railway history. The book is often cited for its comprehensive coverage and clear presentation of technical and historical information.