Katie In The Dark Ages.: A Time-Slip Romance.

In Book four, Katie In The Dark Ages, Katie is at home in her mansion, alone, waiting for her ever-more-infrequent husband to return and to physically display the only thoughts he has for her. Not knowing which way to turn, she visits her friend and they inadvertently time-slip to the Dark Ages.
The big question then is; is there a way back home to her husband, without there being electricity available, or should Katie accept she is in that time period forever, and to make the most of her life there?

In book one. What Katie Didn't Know, Katie, or D.S. Anderson, is married to Jamie but manages to free herself from him, by means of a romantic affair with a colleague, helped by a slice of maybe Science-Fiction, maybe a government experiment, gone wrong.
In book two, What Katie Did In Italy, Katie has a detective agency and attempts to free herself from new-husband Dan, who is maybe not as faithful as first thought. This is helped by a romantic slice of Mafia-Bride novel ideas, where she is destined to eventually fall in love with her owner.
In book three, Katie Went To The Regency Ball, the ball is the central character and spinning from it are affairs, deception, bribery, corruption, romance, kidnapping and psychotic behaviour, in a typical slice of Regency Romance novel.