A HAT FULL OF SKY ( 2004)
In a turtle shell: Tiffany becomes the apprentice of elderly witch, Miss level. Unfortunately, she also has to fight off an invisible monster known as a hiver with the help of the nac Mac Feegles.
“The nac Mac Feegles are basically pixies who have seen
Braveheart altogether too many times. They go around in a mob and they drink and fight.”