Emma, Maddie and the Magic Cubby — Kate Jackson

At last, a classic adventure book series to inspire young girls. When Emma disappears from her cubby house in Australia, a frantic search of Mystery Bay begins. But she's not in Australia, she's thousands of miles away. Scared and alone. Then she meets Maddie - and so begins the first in a series of adventures featuring two little girls with nothing in common but their kindred spirits. Together they must evade ferocious foxes, save badgers and solve the riddle of the notebook and the ancient cubby wall - with a little help from the unlikeliest of heroes.