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Les Pyjamasques et le Grogarou (English: The PJ Masks and the Big Werewolf) is the first book of Les Pyjamasques which was published by Éditions Gallimard on March 29, 2007.

Official Summary

It's midnight, Yoyo, Gluglu and Bibou are not in bed, they're out playing acrobats! But is it safe to go out at this hour? Do they know that when the moon is round, strange creatures roam in the dark and growl? "Not even scared, not even scared!" scream Les Pyjamasques. But what is this beast?

Les Pyjamasques fight the Grogarou that looks like a big nightmare and give small readers the feeling of being able to overcome their nocturnal anxieties.


  • Yoyo (first appearance)
  • Bibou (first appearance)
  • Gluglu (first appearance)
  • Grogarou (first appearance)


The book begins with Les Pyjamasques wandering through the night doing their acrobatics as the clock strikes at midnight.

Les Pyjamasques were interrupted by Grogarou who roared at their faces, but the heroes proclaimed that they are not afraid of him and retaliated by screaming at him which caused him to fall backwards with surprise. Then Les Pyjamasques started playing around with him, wondering who Grogarou is.

Angrily, Grogarou threw them off his back and reveals his plan that he is going to eat the heroes raw as stated that during the full moon he becomes a werewolf. With that, Les Pyjamasques try to evade pursuit from Grogarou, Bibou tries using her cape to trip Grogarou, but she is unfortunate as her cape was caught by the monster who attempts to eat her while protesting that he has school tomorrow. With bravery, Yoyo and Gluglu rush to Bibou's rescue by lunging at Grogarou, and this caused Bibou to break free from Grogarou and used her wings to cover the moon.

Due to the result, this caused Grogarou to shrink into Ptigarou. However, Les Pyjamasques prefers him to be at a "petite" format in which Ptigarou agreed proclaiming that he feels lighter.

At the rooftops in which Les Pyjamasques and Ptigarou met, the heroes decided to give him sunglasses as a gift. Though, this doesn't faze Ptigarou, but was happy that he can watch the moon without turning back into Grogarou. Yoyo asks Ptigarou that if he would had really eaten Les Pyjamasques raw, he disagreed and prefers to have the heroes cooked beforehand. As he took off his glasses, this caused the heroes to run for their lives.


  • This is the first appearance of School, but it was mentioned in this story until it made its physical appearance in Les Pyjamasques et Magistère la sorcière.
  • This book marks the first appearance of Les Pyjamasques and Grogarou.
  • One of Grogarou's lines make a direct reference to the fairytale, The Three Little Pigs.
Book list
| Les Pyjamasques et le Grogarou | Les Pyjamasques au zoo (Mass Market Paperback) | Les Pyjamasques et Roméo Mécano | Les Pyjamasques et Lilifée | Les Pyjamasques et Utupë, l'esprit de la forêt | Le secret des Pyjamasques | Les Pyjamasques et les mascrapules | Les Pyjamasques et le père Noël rebelle | Les Pyjamasques et le marchand de sable (Mass Market Paperback) | Les Pyjamasques et la machine à bisous | Les Pyjamasques et la soupe à la citrouille | La petite sœur des Pyjamasques | Les Pyjamasques et le sablotin | Les Pyjamasques et le croque-chaussettes | Les Pyjamasques et le rêveur de l'arc-en-ciel | Les Pyjamasques et Magistère la sorcière | Les Pyjamasques et Energuman | Les Pyjamasques et le robot-blizzard | Les Pyjamasques et l'opération zéro | La Légende des Pyjamasques (Audiobook Edition) | Les Pyjamasques et le cadeau de Sorceline | Les Pyjamasques et la graine d'Orticia | L'école des Pyjamasques | Les Pyjamasques et la momie d’Apophis, Tome I | Les Pyjamasques et la momie d’Apophis, Tome II | Les Pyjamasques sauvent la nature | Le grand livre d'Apophis | Le cristal des Pyjamasques | Les Pyjamasques fêtent Noël |
| Les Pyjamasques coloring wall | La minibibliothèque des Pyjamasques |
| Roméo Mécano (comic) | Taïtikis (Taïtikis - Les gardiens de l'océan) |
| Be a Hero! | Calling All Heroes! | Catboy Does It Again | Five Little Ninjalinos | Fly High, Owl-Glider! | The Flying Factory! | Friendship Saves the Day! | Gekko Saves the City | Gekko Takes Charge | Go, Go, Gekko-Mobile! | Good Night, Heroes | Hero School | Heroes Everywhere! | Into the Night to Save the Day! | It's Time to Save the Day! | Meet Carly and Cartoka! | Meet Catboy! | Meet Gekko! | Meet the Heroes... and the Villains, Too! (Australia) | Meet Newton Star! | Meet Owlette! | Meet PJ Robot! | Meet the Wolfy Kids! | Merry Christmas, PJ Masks! | Mission Accomplished! | Monster of the Deep! | Mystery Mountain Adventure! | Operation Easter Egg | Owlette Gets a Pet | Owlette and the Giving Owl | Party Heroes | PJ Masks 3-Minute Bedtime Stories | PJ Masks 5-Minute Bedtime Stories | PJ Masks: Battle of the HQs | PJ Masks: Halloween Heroics | PJ Masks: Here We Go! | PJ Masks: Heroes Stick Together | A PJ Masks Collection | PJ Masks and the Dinosaur! | PJ Masks Make Friends! | PJ Masks Save the Daytime! | PJ Masks Save the Earth! | PJ Masks Save Halloween! | PJ Masks Save Headquarters! | PJ Masks Save the Library! (Australia) | PJ Masks Save Lunar New Year! | PJ Masks Save Lunchtime! | PJ Masks Save the School! | PJ Masks Save the Sky | PJ Masks Save the Sleepover! | PJ Masks Storyboard: Race to the Moon | PJ Masks Super Moon Mission Movie Theater Storybook & Projector Book | PJ Masks Take-Along Adventures! | PJ Masks Vs. the Baddies | PJ Riders to the Rescue! | PJ Seeker to the Rescue!: A Lift-the-Flap Adventure | Race for the Ring | Race into the Night! | Race to the Moon! | Ride with the PJ Masks | Speed into Action! | Spring into Action! | Super Cat Speed! | Super Moon Adventure | Super Team | Team PJ Masks | Time to Be a Hero! | To the Cat-Car! | Wheels of a Hero! |
| Bibou et la chasse aux trésors | Bibou et le Ninja-football | En avant la musique! | Gluglu march sur la lune | Gluglu roi de la glace | La grande course des méchants | Mission Père Noël! | Motsuki, la petite soeur de Sorceline | Le Nin'Géant | Le Pyja-Robot | Les Pyjamasques et la chasse aux papinuits | Les Pyjamasques et Flamme rouge | Les Pyjamasques et les Super-méchants | Les Pyjamasques et Tatouro'Tom | Roméo apprend à voler | Super coloriage Pyjamasques | Vive la rentrée avec Yoyo! | Yoyo et la nuit du chat |
Activity Books
| Moonlight Hero Math with PJ Masks | PJ Masks 1000 Sticker Book | PJ Masks: 1001 Super Stickers | PJ Masks: Dot to Dot Heroes | PJ Masks: Giant Colouring Pad | PJ Masks: Hooray for Heroes! Sticker Book | PJ Masks: Mighty Masks | PJ Masks: Save the Day | PJ Masks: Spot the Difference | PJ Masks: Time To Be A Hero | PJ Masks Activity Pack | PJ Masks All Shout Hooray! Deluxe Colouring Book | PJ Masks Book And Masks | PJ Masks Fun Book | PJ Masks Go For It! Colour By Number | PJ Masks Hero Crew Activity | PJ Masks Heroes VS Villains Sticker Activity Book | PJ Masks Let's Go Activity Book | PJ Masks On Our Way! Colouring Book | PJ Masks Paint with Water | PJ Masks Ready to Save the Day | PJ Masks Sticker Book | PJ Masks Sticker Scenes | PJ Masks Super Sticker Book | PJ Masks Super Sticker Scenes | PJ Masks To the Rescue! Colouring Book | PJ Masks Wipe-Clean Activity Book |
| Les chiffres | Les couleurs | Les formes | Les véhicules | Yoyo-Rapido Coloriages & Jeux |
| Pyjamasques N° 1 (Automne 2017) | Pyjamasques N° 2 (Janvier-février-mars 2018) | Pyjamasques N° 8 (Juillet-août-septembre 2019) | Pyjamasques N° 1 (Juillet-août-septembre 2019) |