The Veiled Lodger (The Sherlock Holmes Children's Collection, Book 9)

Seven years ago a disturbing incident took place in the village of Abbas Parva. Mr Ronder, owner of Ronder's Wild Animals Show, met his end after an escaped lion attacked him.
Holmes is confronted with an old mystery when he is summoned to visit a lady who refuses to show her face. A grisly crime committed seven years ago has had terrible consequences, and it is up to Holmes to save the veiled lodger from her own conscience.