My rating: 3 of 5 stars
“A frightful crime has been committed at the Glandier, on the border of the forest of Sainte-Genevieve, above Epinay-sur-Orge, at the house of Professor Stangerson. On that night, while the master was working in his laboratory, an attempt was made to assassinate Mademoiselle Stangerson, who was sleeping in a chamber adjoining this laboratory. The doctors do not answer for the life of Mdlle. Stangerson.”
This is the main plot of the first book of Joseph Rouletabille series. Its sequel is Le parfum de la dame en noir.
I do recommend the French version of this book since it seems there are some issues concerning the English translation.