Part book. Part comic. One electrifying superhero adventure! Holly Sparkes returns to Blue Haven after her summer holiday to find some strange goings on. Weird green slime is oozing out of the ground, there’s been a spate of mysterious robberies, and worst of all she’s losing control of her electrifying super-powers. If she could only stop blowing things up, she might just be able to save the day . . . again!