Stardust: Magic by Moonlight

Nine-year-old Lucy is really pleased when Allegra Greenwood moves in next door and the girls quickly become friends. But when Allegra tells her that she is a 'stardust spirit', Lucy discovers a whole world of magic beyond even her imagination... As well as the ability to fly, each stardust spirit has their own set of very special powers dictated by their individual star. Very soon, Lucy finds out that not only is her secret identity exciting but also brings responsibility.
She has much to learn about stardust and it's going to be a rollercoaster ride along the way! The first of four books about friendships and family relationships weaving fantasy seamlessly into the every day world.