This week is the Sheaf Stitch. It is made up of three parallel vertical straight stitches. You then come up near the center of the middle vertical stitch, take your thread around all three stitches and go back down in the center again from the other side.
It is easier to look at than to read about so here are some examples. Here is a blog that has excellent instructions and photos. As well, Sharon B's Week 28 of the Take a Stitch Challenge featured the Sheaf Stitch.
I think this week will be easier to work with than last week's stitch - have fun!