Susan thought she was done with space aliens when she sent her mother Edna and daughter Cecily as ambassadors to the planet Schtatik. Instead, she must travel across the galaxy to stop a civil war that Edna started when she managed to get herself made queen of one of the clans. The Chenille Ultimatum is the third book in the Chenille series. It takes place on the exotic planet Schtatik, home to quarreling clans, and in San Francisco, where Susan's great-grandmother Agnes met aliens from that planet when she was a child. Agnes' ghost is only one of the allies Susan finds in unexpected places both in space and at home as she struggles to make everyone calm down and get along. On the journey, Susan learns how strong she really is, and how important it is to carry an embroidery project wherever she goes.