Sisters of Glass by Naomi Cyprus

Two girls. Two worlds. Only magic can bring them together, in this fantastical middle grade adventure for fans of the Descendants and School for Good and Evil series.

Halan is a powerless princess. She is heir to the Magi Kingdom, a blazing desert land ruled by ancient magic. But unlike every royal before her, Halan has no magical powers of her own.

Nalah is a powerful pauper. The glassblower’s daughter, she lives in the land of New Hadar, where magic is strictly outlawed. But Nalah has a powerful force growing within her—one she can’t always control.

One girl fears magic, one worships it. But when a legendary mirror connects them, Nalah and Halan finally meet—and must work together to save their two worlds, before everything they know is shattered forever.