Philippa Fisher and the Fairy's Promise: Philippa Fisher, Book 3 (Unabridged‪)‬

Philippa is excited to spend Christmas break with her friend Robyn, but she has no idea just how much excitement awaits. When a magic spell carved on a mysterious circle of rocks suddenly transports Philippa to fairy godmother headquarters, she learns that her own mother is in danger. To protect her from a serious accident, Philippa must pretend to be a fairy, while Daisy, her fairy godsister, returns to earth in human guise. And that's just the beginning of their adventure: after passing a harrowing test of their loyalty to each other, Philippa and Daisy undergo a fantastic journey to rescue a lost fairy who has devoted her powers to maintaining the portal of the stone circle. With time running out, and the worlds of humans and fairies at risk of being severed, Daisy finds herself facing an extraordinary choice that has the power to change her life forever.