The Dragon and the Gruesome Twosome by M. P. Robertson
George and his dragon are off on a magical adventure but this time it is in a fairytale kingdom whose subjects are under attack from two fearsome troll twins, Gobbledegook and Balderdash. The twins are destroying everything and everyone in their path. Something must be done - and George has a plan!
Also in this series: The Egg,, The Great Dragon Rescue and The Dragon Snatcher
Also in this series: The Egg,, The Great Dragon Rescue and The Dragon Snatcher