Card backs are available? I couldn't see them?
Most of the cards are double sided. The only cards that really have a back are the Worker/Character cards. And in that case the card named W00 is the card back for all the cards (Fronts: W01, W02, etc.). All the other cards follow a naming convention example of X01a and X01b is 1 card; (a) is the front of the card and (b) is the back of that same card. There is only 120 cards in the game. Hope this clears up any confusion.
40 Buildings (double-sided; 10 each in four colors)
59 Characters
4 Scenarios (and the same 4 in German)
8 Chapter Cards
4 Overview/Secret Objectives
1 First Player card