In this fascinating book, the former Depot Manager at Finsbury Park tells the entire story of the Deltic locomotive, from its origin and design through the construction of the first prototype and then the full 22 member cohort of what became BR's Class 56, its twenty year run as the pride of the East Coast main line, including the maintenance needed to keep these powerful but demanding locomotives running. Illustrated throughout with black and white photos. With rosters, initial running schedules, and list of preserved locomotives. 144 pages with index.