Challenge on the Hill of Fire

Over 1 million sold in series!
Kidnapped by Celtic Druids in 433, Patrick and Beth are headed to certain death when followers of a former Irish Slave (Saint Patrick, called Patritius in this book) save them. The cousins find themselves in the midst of a power struggle between Ireland's King Logaire, Patritius, and the leader of the Druids, Lochru. A spiritual showdown begins...