- X fra det ydre rum, Blå Læseklub
- X is for X-Ray Fish
- X Marks the Spot!
- X, Y and Z are for... Xaviour the Xiaosaurus, Yan the Yaverlandia, and Zoe the Zephyrosaurus
- X-Change Students 101 (Marvel Avengers Assembly #3)
- 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)
- Xerik the Bone Cruncher
- Xi Jinping Der mächtigste Vorsitzende nach Mao Zedong
- Xiao Zhu, Little Pig
- Xica
- XO, OX
- Xochiquetzal y Popoca. La leyenda de los volcanes
- 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