Step 1: Once you've found the spot in your project to begin your slip stitch (for the granny squares, this will be where your stitch marker was to make the first ring of the square), insert your hook ...
I like Faina Goberstein and Simona Merchant-Dest, the authors of "The art of slip-stitch knitting." I have their other book, "The art of seamless knitting," and it's very good. But when Interweave ...