I recently purchased Claudia Schumann’s Spiralketten, a book of her spiral stitch variations. The text is in German, but if you understand spiral stitch, her instructions are easy to follow. The basic variations are described and illustrated at the beginning, and pictures of various spirals and their stringing/beading count follows.

This is her picot spiral, and I used the beads I had on hand. The spiral of green on the outside is supposed to be the 1.8 mm cubes, but I used particularly blocky seeds (Matsuno?). I gave this as a gift, and the recipient loved it!