With This Ring — Joanne Karen Joy

While visiting her uncle, the Earl of Caithness, in the far north of Scotland in 1880, Tess Davies cannot help exploring the mysterious Girnigoe Castle. Late one night, in the shadowy great hall, she realizes that she is not alone, that her insatiable curiosity may have taken her too far...

The enigmatic visitor she encounters is William Ruel Sinclair, a fierce and rather stubborn warrior hailing from 1690. Somehow, he has traversed the vast chasm of Time. He must now rely on Tess and her uncle to help him to discover the elusive secret that will allow him to return to his own time. And he must hurrythe castles he loves, and Clan Sinclair itself, are in immediate danger...

As Tess and Will attempt to unlock the secrets guarded by Girnigoe Castle for centuries, our young heroine finds that she is falling hopelessly in love with the fierce Sinclair man who has inexplicably been thrust into her life.