There's Someone in the House, Serge Quadruppani, Christophe Merlin

In this confined story, told in the first person by Paul, a very mature teenager whose life is overshadowed by an absent father, we find the incisive and effective pen of Serge Quadruppani, one of the sure values of French crime fiction.

When his mother, a doctor, works at night, Paul is alone with his younger siblings in the large family home. That night, like any other, he tries to calm the anxieties of the little ones who hear suspicious noises. However, when he discovers a broken window, Paul has to face the obvious: someone has indeed broken into the house...

The children then meet Ronaldo, a man with strange behavior, but who immediately inspires sympathy in them. Who is Ronaldo really? It's with the arrival of the "real bad guys" that the truth will be revealed... And amidst lies and pretenses, Paul will have to show courage, intuition and discernment.