I'm not sure what you mean. Are you talking about books, movies, games? I guess it doesn't really matter, since all should be available online. Have you tried Amazon? The game sounds fun to me, but it seems like it might be kind of past it's best by date. There isn't much discussion about it.
Yeah I am guessing that wherever you look you should be able to find something related to the series. It is getting pretty popular so I have been seeing them all over.
It's a bit tricky to help without more detailed information, isn't it? However, you ended up handing over the golden key because on the Amazon site it's possible to find everything related to the saga.