The silver road by Sinead O’Hart

When Rose is entrusted with a powerful stone by a Frost Giant, she is swept into an adventure full of danger. The stone can be used for great good or great evil, depending on its keeper. It leads Rose to discover the magic that runs through all of Ireland. A magic that is threaded together beneath the land: the Silver Road. But the Silver Road is under threat. Now Rose must keep the stone from falling into the wrong hands and embark on a quest to find its rightful owner and keep the magic alive.