In the second book in the series, Rosy and the Secret Friend, its summertime, and the island cottages are taken over by the Summer People. The fairies are supposed to stay in hiding, away from the big, scary humans. But one Summer Child, Louisa, is sick and lonely. Kindhearted Rosy knows just what to do to make her feel better. Soon Rosy and Louisa are secret friends! How can Rosy keep such a big secret from her very own sisters?