Jean-Noël Brouté

Gustave Klopp suffers from narcolepsy, he can fall asleep everwhere at anytime whithout warning. Living a simple life with his wife Pam and his best friend Lenny Bar, Gus decides to undergo therapy sessions and finds out that he can make incredible comics from his dreams.

Joseph Rouletabille, a reporter for a local newspaper, investigates the attempted killing of Mathilde Stangerson, who uses the yellow room of the title as her bedroom. At the time of the revolver shots her room was locked and the windows were barred, but when her father enters after having forced the door, there is no-one there except for Mathilde. So who did it and how did he get away?