I wanted to provide a link to the pattern:
I did a search on ravelry for Leigh Radford, and recognized some of the projects I've done, the Knitted Bath Puffy and the Spiral Rib Bag.
Vogue Knitting illustrates a back stitch here, also shown is a slip stitch crochet seam that could work nicely for your top.
And this is a link to an embroidery page. It has an illustration of the back stitch that shows concisely how the stitch is to be worked. I think it is a little difficult to see that in the knitted pieces.
The back stitch is a very easy stitch to work.