Fascinating history of the Class 9F 2-10-0 locomotives. The author, Librarian of the National Railway Museum in York, was a specialist in the design and operation of BR locomotives and here he tells the story of the 9F, the final main line steam locomotive built in any significant number. He explores the early issues (of concept and development), how the 9F broke new ground through its extraordinary power classifications, its trials and tribulations, the units fitted with Franco-Crosti boilers, its demise at home and use abroad. Illustrated throughout with black and white photos as well as numerous schematic diagrams. With roster and technical charts showing its power. 92 pages.