A magical bibliomantic detective story set in Victorian London. London is a city fascinated by books. Mercy Amberdale, a talented bibliomancer, spent her entire childhood in bookstores and antique shops. She knows many witchcraft stories that help her at night to get the most valuable copies for rich collectors in the secret libraries of England. One day, following the trail of books, she ends up at the scene of a mysterious murder: a bookseller burned down in the middle of his store, but not a single sheet of paper was damaged . Mercy finds herself caught up in a cycle of magical intrigue and dark family secrets until her search for the truth leads her to unravel the whole story.