Hello UK and US fans,
There is a copy on the UK Amazon website of the one and only "The Island of Sodor; It's People, It's History, and Railways." Now, when you look at the price, it is expensive for US fans. I tried to order it yesterday, and the thing is, you have to check on your spending limit in other countries. For UK fans, I don't know if there'll be any problems since you live there, but I'd just check with your limit with your bank.
Here's the link: https://www.amazon.co.uk/Island-Sodor-People-History-Railways/dp/0434927627/ref=sr_1_1?s=books&ie=UTF8&qid=1513186985&sr=1-1&keywords=the+island+of+sodor+its+people%2C+history+and+railways
Hope this helps, Loco123456