The "Branch Line Society. Branch Line Index. 3rd Edition. Paperback. Lewthwaite 1991" is a book focusing on railwayana related to British Rail (1948-1997). Published in the United Kingdom, this paperback edition provides a comprehensive index of branch lines in the region. It is a valuable collectable for enthusiasts of transportation memorabilia and railway history, offering detailed information and insights into the British railway system during the specified era.