Mary Finch and the Grey Lady

"THIS IS THE DAY WE AWOKE DEATH," Mrs Grady said.
Meet thirteen-year-old Mary Finch - a bold, determined heroine, and the star of a stylish new detective series.
The avenging spirit of a priestess to an Egyptian queen, the Grey Lady, has murdered five people and now has her sights set on Mary Finch's employer. How do you kill a spirit set on revenge?
A clairvoyant may have the answer, but the ghost she raises exposes a dreadful secret that has lay hidden for over thirty years. When her young friend, Fortune Dubois, goes missing, Mary finds herself on the violent and gritty streets of Victorian London chasing a spirit and hunted by the living.
Mary Finch and the Grey Lady is the second in the Mary Finch Mystery series.