The Will of the Empress (Circle Continues #1)

Sandry, Daja, Briar, and Tris, are older now and back together again, in an exciting and much-awaited, stand-alone novel by everyone’s favorite mage, Tamora Pierce.
For many years, Sandry’s cousin, the Empress of Namorn, has pressed her to visit. But Sandry prefers to stay with her own family in Emelan. Now, as is her right, the Empress has insisted. Sandry will not travel with a group of warriors — that would only insult the Empress. She will travel with her friends from Winding Circle: Daja, Briar, and Tris. But the four young mages haven’t been together in some time, and their friendship isn’t what it used to be. Since they left Winding Circle, each has seen magic manipulated in ways — both good and bad — that they could not have imagined (cont’d)