Yes, it is a theme. Ida, the blanket that has consumed me, is all consuming. Perhaps I love her so much because each section is attached while it is worked. When she is finished, she will be finished with no seams the sew. Gotta love that.
I did not even look up options for accomplishing the task. With boldness as my partner, I took a circular knitting needle to the back loop of those double crochet stitches and picked them up. Notice that I did not pick up and knit. I only picked up each loop.
With the live stitches from the double crochet stitches on the knitting needle, it is a simple matter of knitting the dc loop together with the last knit stitch so as to connect the two sections. If you have ever knit on an edging, you'll recognize the k2tog join as being a typical method of joinery.
FYI and because I know you are curious, the in this section the crochet is worked with a bulky yarn to which a chunky yarn is coming to the party up.
Check out the resulting join. Lookin' good!