Edward Marston books (Ashfield CA14)

Does anyone have any of the EDWARD MARSTON RAILWAY DETECTIVE books they no longer want? I have an elderly friend who has just started reading them and would love more. I can collect Workington Cockermouth Maryport Whitehaven. Sadly any further afield and petrol costs don't make it viable. So thank you to those in Carlisle etc who offer but I must decline.