You're lucky,
Morth - the German volume isn't out yet. As long as you make sure that Music is spelled with a "c" and not with a "k" as Musik, you'll get the English book.
Also, the German translation of Middle-earth is "Mittelerde"...
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'Mercy!' cried Gandalf. 'If the giving of information is to be the cure of your inquisitiveness, I shall spend all the rest of my days in answering you. What more do you want to know?' 'The whole history of Middle-earth..
.'