homemade@myplace: Block Stitch Afghan : the way I do it !!!! An excellent instruction page.
Warm Jewel Granny Square,by Kimberly Andrew... Free pattern!
PLT Join for Granny Squares (decorative, quick, lays flat): http://cypresstextiles.net/2016/01/22/sc-jayg-with-plt-join/
"Crochet meets Patchwork" Afghan | Green Granny Squares Pattern Round-up
Heart Granny Square - Free pattern by Emma from Steel & Stitch @ Love Crochet blog
Instructions on how to join two granny stitch squares using the double crochet join.
Crochet tutorial: joining granny squares 9