Is it only in America that the new Ghostbusters Comic Book will be sold?
Because I live in Ireland so I might not be able to get it :f :u

As far as anyone can tell from the press release, the comic is only going to be printed in North America - this is not to say that stores in your area can't get it, it does likely mean that you will have to get them to special order it for you.

Ema, I'm not sure where in Ireland you live, but I'll bet you a pint of oyster stout (best served in the Porterhouse in Dublin - I'll never forget that weekend, but it's a whole other story!) that Forbidden Planet in Dublin will be able to get you a copy. If it's in Previews or distributed by Diamond (and I'm 99% certain it will be), they can get it.
And yes, they take telephone and mail orders.