Brigitta of the White Forest - Faerie Tales from the White Forest, #1

Briggy, what happens when the Hourglass runs out? Brigitta wished she had paid more attention to her Auntie Ferna's lessons. Being able to string a thunder-bug symphony wasn't going to help them now. She didn't know exactly what would happen when the Hourglass ran out, since no living faerie knew a time when the Hourglass didn't protect the forest .