L'ècole des Pyjmasques (English: The School of Pajamasks) is the twenty-third book of Les Pyjamasques which was published by Romunald Racioppo on April 5, 2018.
It's night, yet Pyjamasques go to school. And, it's a very strange class, a class full of little nocturnal heroes! Are present the Mascrapules, Lilifée and Tatouro. Professor Energuman begins by showing them gadgets. At that moment, comes Roméo who wants to transform the school to make his laboratory! Fortunately, Les Pyjamasques and Les Mascrapules team up and despite their differences, manage to counter Roméo.