FIrst published in 2014 by Usborne Publishing Ltd., England. This edition published in America in 2015.

Do you wish to be fairy-sized, light as a feather? Then open this book and we'll fly together. Only promise you will never tell, where the fairy ponies dwell. Holly is staying with her Great Aunt May when she discovers a tiny pony with shimmering wings. At first, she thinks she must be dreaming...until two fairy ponies visit her one night on an urgent undertaking: Puck the fairy pony has been snatched by the spoiled girl next-door, and the ponies need Holly's help to rescue him. Little does Holly know that their midnight escape will lead to a special reward...entry to the secret world of the fairy ponies, hidden in the Great Oak Tree at the bottom of the garden.