Spring Shine Sparkles (Butterfly Wishes #4) by Jennifer Castle

Sisters Addie and Clara have just moved to a new house in the country, where they discover that their backyard is a gateway to the enchanted realm of magical butterflies called Wishing Wings. These special butterflies have the power to make wishes come true!
Addie is so excited to get a special visitor for the weekend, but things don't go quite as she's planned. Meanwhile, a new butterfly, Spring Shine, has come out of her chrysalis and somehow believes she's missing her magic-even though there's nothing wrong with her at all! It must be the magical curse at work, once again. When Spring Shine disappears, Addie must find her, and figure out a way to raise her spirits. Will she be able to help her friend, and discover who's responsible for this mess, before another butterfly gets hurt?
Perfect for readers of Rainbow Magic and Princess Ponies, this magical chapter book series is a dream come true!