(Library of Congress description):
While visiting distant relatives in Ireland, a teenage brother and sister, curiously uneasy about the strange workman on their cousin's farm, discover his strange powers when they are all transported back in time to take part in the struggle between Cuchulain of Ulster and Queen Maeve of Connaught.
Original title: The Druid's Tune
Genre: Fiction→ Fantasy→ Saga, Myth, and Legend
Fiction→ Children & Young Adult→ Fantasy→ Time Travel