"The Colour of Steam: Great Western Main Lines Vol. 1" by Nigel Trevena is a book that delves into the history and elegance of the Great Western Railway (GWR). Focused on railwayana and transportation collectables, this publication captures the essence of the GWR era through detailed descriptions and captivating images. With a specific focus on the main lines of the Great Western Railway, this book is a must-have for collectors and enthusiasts alike, offering a nostalgic glimpse into the golden age of British Railways.