Torc of Stone. Mórdha Stone Chronicles, #3

AJ Moore's future comes down to one thing-discover the secret of the ancient stones and find her way home. Unfortunately, her journey is far from over. The stones now reside in the hands of Finn Murphy's most cunning enemy, the Duke of Dunsmore. Against a formidable foe, AJ and her new team of friends pursue a risky plan to steal the stones and the book that may reveal their secret. If successful, the mission prevents a madman from coming into unimaginable power while providing AJ an end to her long struggle.
Back in Baywood, two hundred years in her future, AJ's brother, Adam, and her best friend, Stella, attempt to put their differences aside to join forces to find AJ. Old family journals, Celtic lore, and earrings made of stone lead them down a mysterious and unbelievable path, leaving them to question their own sanity. In the end, it's AJ who must decide between the promise of the stones or her love of the man who forever changed her life.