I'm trying to find the title of a book or the autrhor's name. Would anyone be able to provide me with this from a description of the plot?
The plot involves a librarian who discovers a letter inside a book. This letter asks her to do certain tasks - some, very unpleasant. Each time she successfully completes a task she receives a reward of doubling the money. One of the tasks is to climb a statue of a horse or horses head.
Anyone got an idea of what the book's title is or the author?