I have just finished reading the fourth book of five so far published in this series by Neil Parkhouse. I have quite a library of Railway Books and the books in this series are among the best I have, alongside a number from the same publisher, Lightmoor Press. ..... http://rogerfarnworth.com/2020/04/1...l-parkhouse-british-railway-history-in-colour
I really don't know. They are excellent books but I could imagine they'd be relatively low on the priority for purchase by libraries.