The Thunder Egg (Dragon Games #1)

An adventure-packed series about three kids who travel into a magical, dragon-filled world! Luca, Yazmine, and Zane are transported by the Thunder Egg to Imperia, a dangerous and magical world where dragons and huge beasts roam. Some are friendly - and some are definitely not. Luckily, when the kids enter Imperia, they take on a special form: either a dragon, a beast, or a superhuman. Our heroes must embark on a quest to return the mythical Thunder Eggs. Once these Thunder Eggs hatch, the dragons born from them will be the three leaders of Imperia. Together, they will ensure the land returns to harmony - and that dragons once again flourish.