Taki and Olivia are sisters in an adoptive family—and they're driving each other crazy! Every day, their overprotective mother makes them walk to school together, eat lunch together and play together—they can't get away from each other! But when a secret experiment goes catastrophically wrong, the squabbling siblings suddenly find that they have superpowers. They're the first actual superheroes in the entire world—and it is awesome! But are the girls ready to face the daunting challenges posed by their amazing new abilities? And is the rest of the world ready for real-life superheroes? Find out in from the acclaimed creative team of Brian Michael Bendis and Michael Avon Oeming—an electrifying tale of adventure for comics fans of all ages! Collects the original graphic novel and its sequel miniseries issues #1–#4.