Books on the RhB in English

A friend asked a question on another forum

"Is anybody aware of a book on Rhatische Bahn (RhB) and its railway network, especially the routes we see in TS (Albula, Bernina, Arosa..) in English?
I could only find books in German unfortunately...

What I am after is a comprehensive book released in the last 10-15 years on the RhB railway lines and/or RhB locos."

Any suggestions - those I found on Amazon were all in German which my friend does not read.


TS is the Train Simulator game

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