Serafina has grown up happily with her father in the basement of the big mansion learning her place in the world. Her father fixes things and Serafina, as it turns out, is really good at catching rats. She has never spoken to the guests of the Biltmore Estate or even the family to whom the mansion belongs; she is a secret. No one at Biltmore knows she exists until one day she witnesses a young guest disappear and fights a terrible monster in a black cloak. She can’t help herself; she has to warn the others. She decides to tell Braedden Vanderbilt, nephew of the Biltmore owners, and luckily he turns out to be a reliable ally because there is a great force of evil they must combat, and Serafina needs all the help she can get.
If you enjoy mysterious stories you might also like Ophelia and the Marvelous Boy, by Karen Foxlee, or The Ocean at the End of the Lane, by Neil Gaiman.