The Dragon Keepers series is perfect for readers who've finished Mary Pope Osborne's Magic Tree House series but who aren't quite ready for Harry Potter. It's super-accessible fantasy that's imaginative and adventure-filled! 

In The Dragon at the North Pole, dragon keepers Jesse and Daisy wake on Christmas morning to a winter wonderland—it snowed overnight! Knowing that their dragon, Emmy, has never seen snow before, they hurry to the barn only to discover that she's disappeared. She's left a note behind: "Gone with Santa." Santa?! Can it be true? With the help of two pairs of magic snowshoes, Jesse and Daisy visit the North Pole to find out!