England, 1881. Hereford Cathedral stands sentinel over the city, keeping its secrets, holding long-forgotten souls in its stony embrace. Hecate Cavendish speeds through the cobbled streets on her bicycle, heading for her new life as Assistant Librarian. But this is no ordinary collection of books. The cathedral houses an ancient chained library. The most prized artifact, however, is the medieval world map that hangs next to Hecate’s desk. Little does she know how much the curious people and mythical creatures depicted on it will come to mean to her. Nor does she suspect that there are lost souls waiting for her in the haunted cathedral. Some will become her dearest friends. Some will seek her help in finding peace. Others will put her in great peril and, as she quickly learns, threaten the lives of everyone she loves.

CITY OF TIME AND MAGIC sees Xanthe face her greatest challenges yet. She must choose from three treasures that sing to her: a beautiful writing slope, a mourning brooch of heartbreaking detail, and a gorgeous gem-set hat pin. All call her, but the wrong one could take her on a mission other than that which she must address first, and the stakes could not be higher. While her earlier mission to Regency England had been a success, the journey home resulted in Liam being taken from her, spirited away to another time and place. Xanthe must follow the treasure that will take her to him if he is not to be lost forever.

As the bustle of the winter holidays in the Little Shop of Found Things gives way to spring, Xanthe is left to reflect on the strange events of the past year. While she has tried to keep her time-traveling talents a secret from those close to her, she is forced to take responsibility for having inadvertently transported the dangerous Benedict Fairfax to her own time. It is then that a beautiful antique wedding dress sings to her. Realizing the dress and her adversary are connected in some way, she answers the call and finds herself in Bradford-on-Avon in 1815. Fairfax is threatening Xanthe into helping him with his evil doings, and demonstrates all too clearly how much damage he is capable of causing.

After her adventures in the 17th century, Xanthe does her best to settle back into the rhythm of life in Marlborough. But there are still things waiting to be found, still injustices needing to be put right, still voices whispering to Xanthe from long ago about secrets wanting to be shared. While looking for new stock for the shop, Xanthe hears the song of a copper chocolate pot. Soon after, she has an upsetting vision of Samuel in great danger, compelling her to make another journey to the past. This time, she'll meet her most dangerous adversary. This time, her ability to travel to the past will be tested. This time, she will discover her true destiny. Will that destiny allow her to return home? And will she be able to save Samuel when his own fate seems to be sealed?

Xanthe and her mother, Flora, take over an antique shop in the historic town of Marlborough. Xanthe has always had an affinity with some of the antiques she finds. When she touches them, she can sense something of the past they come from and the stories they hold. It is while she’s examining a beautiful silver chatelainem that she’s transported back to the 17th century and discovers there is an injustice in its history. The spirit that inhabits her new home charges her with saving her daughter’s life, threatening to take Flora’s if she fails. While Xanthe fights to save the girl, she meets architect Samuel Appleby. He may be the person who can help her succeed. He may also be the reason she can’t bring herself to leave.

Morgana is a sharp-minded girl who possesses a strange magic that allows household objects to move at her command and brings bad luck to those who do her ill. Cai Jenkins, the widowed drover from the far hills, takes Morgana as his wife, and she soon falls in love with him and his farm. But Morgana's strangeness is soon noticed by the people of her new village, and one person will stop at nothing to turn the townspeople against her.