"The summer solstice is celebrated around the world, but in one place it holds particular meaning: the mysterious monument of Stonehenge. You seek a wise druid named Alastair who claims to have knowledge of the fabled missing heelstone."--Cover.

Having defeated the Garr, a vicious tree monster who lived within the enchanted woods of Watch Hollow, Lucy and Oliver Tinker now have the home they've always dreamed of: Blackford House. Powered by a magical clock and full of curious rooms and improbable knickknacks, Blackford House brims with the promise of new adventures. Yet when a strange governess arrives from England--bringing with her the Kojima twins, Agatha and Algernon--the Tinker children's...