Cybele's Secret is by Juliet Marillier. The sequel to Wildwood Dancing, the story takes place six years later as Paula and her father travel to Istanbul to trade for a mysterious religious artifact. Then a fellow trader is murdered, and they discover there are others who also want Cybele's Secret and will do anything to acquire it. But the artifact is also sought by those from the Other Kingdom, and they send Paula's sister Tati to help her get the artifact for their purposes. A charming sequel filled with danger, adventure, betrayal, and a love story to boot.
Ratings: 8th grade - 9 out of 10 - AC (some mature thematic content).