Gaston Leroux 
The Mystery of the Yellow Room [EPUB ebook] 

This novel—the classic French detective story—was written in 1908 by Gaston Leroux, once a reporter who covered the famous trials of his time. Match your wits with his rival detectives—one amateur, one professional—as they try to crack the mystery. Mademoiselle Stangerson retires to bed in the Yellow Room. Suddenly revolver shots echo through the house and she screams for help. Her father and a servant run to the locked room where they find the wounded girl—alone. The only other exit, a window—barred. How had the assailant escaped?