Alex, I know you don't want special treatment, just be aware that the Aspergers is going to cause you some problems communicating in here, and you'll have to be patient with yourself and us.
Culture is such a big subject that it's not usually covered by one book or set of books. The closest thing I can think of would be at your local library in the children's or young readers' area--there are often series written for youngsters that discuss countries or cultures in a basic way. For example, when I wanted to read about Finland, I found a series of books that included Finland, Sweden, Norway, etc.
That's only the beginning however, and how much research you'll do depends on how deeply you want to study into a specific culture.
Best wishes, and I hope you find what you're looking for.