Dear Helen,
It is not a book, it is an article, very interesting. It is a chapter of a book Romanov Autumn. You can contact Arturo Beeche at Eurohistory, I think he has it. I have mine in my house in Florida, so I really can not help you before you go to Ekaterinburgh. I could send you a copy by the end of the year when I will be down.
Anyway, please port as many photos from Ekaterinburgh as you can, I am sure it will please all of us. Have a great trip
Amelia