note all of my books contain Arabic should this be a problem?
It depends on how much Arabic, because Apple does not accept primarily Arabic books unless they are in epub3 format, so you need to find someone who has the special expertise to do that. In addition, last I heard the iBookstore was not yet accepting Arabic books at all. So you need to check that. Perhaps the contacts at the end of the FAQ would help:
If you are talking about a primarily English book with some Arabic inside it, I think that would not be a problem.