The circle is not hard! I promise. There are no curved pieces. You can sew the circle on with hand sewing or embroidery stitches on the edge with your machine or just straight sewing around the circle 1/4" in. I just sew it 1/4" in and turn it and sew slowly. It really isn't hard and once this is over it is just straight blocks sewn together! And with this small project you will only be doing 4 circles. It won't be 30 or something like you would for a large quilt. so don't anybody stress too much about the circle. If nothing else you can attach it with steam a seam or something like that if the circle stitching really bothers you.
So I hope we all have fun making the drunkard's path blocks bookmark!!