Humphreys, Chris

After he and his cousin Kristin discover a sea chest full of runes and a journal belonging to their deceased Norwegian grandfather, fifteen-year-old Sky summons the old man's ghost, who teaches him how to use the power of the runestones to travel through time and space.

Sky and Kristin travel to the seventeenth century to learn secrets from their ancestor, the witch Meg, then to the Battle of Hastings to use that knowledge to prevent their evil grandfather Sigurd from ever possessing another person.

After exploring a sea chest full of runes and a journal belonging to his deceased grandfather, fifteen-year-old Sky summons the old man's ghost, who teaches him how to travel through time and space.

After realizing the enormity of his Norwegian grandfather's betrayal, fifteen-year-old Sky leaves England to follow his visions to Corsica, the homeland of his other ancestors, hoping to find some ways to defeat his grandfather's powers and restore his cousin Kristin's free will.

After realizing the enormity of his Norwegian grandfather's betrayal, fifteen-year-old Sky leaves England to follow his visions to Corsica, the homeland of his other ancestors, hoping to find some ways to defeat his grandfather's powers and restore his cousin Kristin's free will.

Despite strange dreams and her ailing father's firm belief in the family lore of a long-ago ancestor's connection to the mythical unicorn, fifteen-year-old New Yorker Elayne remains skeptical until, during a school visit to the unicorn tapestries in the Cloisters, she finds herself entering a tumulteous world where she must fulfill the legacy of her ancestors by taming the unicorn and bringing a tyrant to justice.