Laura Hemming 
Bluebell Cottage – Magpie Mishap [EPUB ebook] 

Bluebell Cottage just looked like any ordinary rural, village cottage, but it had a hidden secret. It was the home of Seth Speller and his younger sister Maisy. The hidden secret to this house was that at the bottom of the garden there was a fairy village. Seth and Maisy were the only humans to know this magical village existed. Both children had many adventures with the fairies, most of which often involved helping injured wild animals back to full health.