Bride series (Catherine Coulter)

Mad Jack is in reality Winifrede Levering Bascombe, who, happily, has her name changed very quickly in the story. She arrives in London with the aunts, Mathilda and Maude, to beg the assistance of Lord Cliffe, Grayson St. Cyre. He welcomes the aunts, briefly spots the valet, Jack, and proceeds very quickly after their arrival to fall down the rabbit hole. He catches the valet, Jack, stealing his horse, Durban, chases Jack down, and then all sorts...

Finding a child severely beaten, Ryder Sherbrooke makes her his ward; she names herself Rosalind de la Fontaine since she cannot remember who she is. In her first London season in 1835, she meets Nicholas Vail, and they are led to a mysterious book written in code by a sixteenth-century wizard.