When I join my Granny Squares together I always choose to crochet them rather than stitch them. Its just the way that appeals to me, although many of my hooking buddies prefer the stitching method. I guess it's a personal preference. And as many of you have asked me to supply this information, here you have it: my take on joining the Grannies, in usual Attic24 style with waaaaay too many pictures I suspect.
But hey, I want you to get it and not struggle with it, and I think pictures do the job better than words.