The Mystery of the Yellow Room. The Spirits of the Lady in Black

In the center of the plot of Secrets of the Yellow Room - impossible crime.
In the castle of Glandier, not far from Paris, an attempt was made on a young lady - the daughter of a famous scientist. The victim miraculously survived, but cannot tell anything about the criminal. How was the killer could get into the room if the doors were firmly locked, and the grate on the window remained untouched? It seemed to arise from the air and disappeared into the air. But Joseph Rultabiil has his own, by no means a mystical version of what happened ...
The second novel of the cycle is also included in the collection - “The Spirits of the Lady in Black”.
Both works are filmed more than once, including the master of French cinema Marseille L "Erbier