A Witch in Time — P. Michael Henninger

Did the powers of ancient sorcerers and witches fade away over the millenniums, or are they still known to some? In ancient Celtic times, a Druid sorcerer does not return from a council, leaving his apprentice lover to wait. Even his spirit seems to have vanished. In the twenty-first century, a computer engineer encounters a woman who introduces him to a world of ancient magic, a world with which he must become acquainted. She will learn that he holds powers he does not understand, but which will protect both he and others from harm.