- X fra det ydre rum, Blå Læseklub
- X Marks the Spot!
- X, Y and Z are for... Xaviour the Xiaosaurus, Yan the Yaverlandia, and Zoe the Zephyrosaurus
- X-plosion
- X-Rays
- X-Rays (Readaloud)
- X-WHY-Z (A TIME for Kids Book)
- X-WHY-Z Animals (A TIME for Kids Book)
- X-WHY-Z Space (A TIME for Kids Book)
- X-WHY-Z Your Body (A TIME for Kids Book)
- Xa é a hora de ir durmir
- Xadrez Básico
- Xadrez em ação
- Xander and the Dream Thief
- Xander and the Lost Island of Monsters
- Xanthia's New BFF
- Xantors Gedicht
- Xavier and the Polka-Dot Fish
- Xavier Ox's Xylophone Experiment
- Xavier's X-rays
- Xenia får en ven
- Xerife Joca e o Tesouro Perdido
- Xerkan the Shape Stealer
- Xi Jinping Der mächtigste Vorsitzende nach Mao Zedong
- Xiao Zhu, Little Pig
- Xica
- Xin y Nix ven el futuro
- XO, OX
- Xochiquetzal y Popoca. La leyenda de los volcanes
- Xocolata a carretades
- Xtraordinary People
- Xway, Xway and the Giant Red Cedar
- Xyla Plays the Xylophone: Beginning Letter Sounds: Phonics for Preschoolers
- Xylophones Are Not My Thing, I Love Dancing!
- Xô, coronavírus
- Xулиганы