This is a reference set of rules to help players set up and play a game of Rivals for Catan, Duel of the Princes.
It won't be so helpful with the basic or 'theme games'. They;re very similiar but the setup stage is different.
My partner and I recently tried to play RFC after not playing it for a year, and whilst we remembered the basic rules of the game and felt conformtable playing the advanced game, we couldn't remember how to set it up, etc. The English rules that come with the game are laid out badly, IMHO, and you need to read the entire book just to figure some simple questions out.
Also, the English rules are missing some bits from the German ones, notably that in the Duel scenarion there is NO OPEN EXPANSION deck, like in the theme games. I had to search on BGG myself to find this answer, as there's half moons on the university/etc but the book doesn't explicitly state how that is handled.
Hope this helps other users. :)