left hand

Beginner's calligraphy; and am I hampered by being a lefty?

I know that there are already a few posts in the forum on beginning calligraphy, but I have slightly more specific needs. I'd like to learn calligraphy, especially since at some point I'd also like to do a bit of type design, and I have already come across a number of books on [[http://www.amazon.com/s/ref=sr_st?keywords=calligraphy&rs=1000&page=1&rh...|Amazon]] and elsewhere. The problem is that I'm not really sure if such books cater for left-handers, or if indeed it makes any difference at all. Any thoughts or specific recommendations?