Title: Earth magic
Description: Thank you for watching my earth child. In an emergency, please call  me. . . . So begins the mysterious note Polly and Sam discover in the woods near their grandparents' farm. There's no child in sight, but they do find a most unusual rock. Polly and Sam drag it home, but the strange-looking stone won't stay put! Before long, it is clear that something magical is happening to them again!From the Trade Paperback edition.
Subjects: Brothers and sisters, Fiction, Greek Mythology, Juvenile Fiction, Juvenile fiction, Children's fiction, Brothers and sisters, fiction, Fantasy fiction