I was looking everywhere for these too. I couldnt find them on disneystore.com or online anywhere else. I ended up buying a knockoff for $1.99 with $4 shipping on
amazon. But when i went to
Disneyland 2 weeks ago i saw the one i wanted it had the princesses on it, it said "autographs and photographs". then on the bottom it said "disney princess", and underneath that in small writing it said "Disneyland".
So i believe all the official autograph books say either Disneyland or WDW.
Hope that helps