361 pages
English language
Published 2007 by Knopf.
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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.
Subjects
- Supernatural -- Fiction
- Time travel -- Fiction
- Cousins -- Fiction
- Grandfathers -- Fiction
- Adventure and adventurers -- Fiction