The Vengeance of Vinister Vile by Guy Bass
It's not easy being the son of a superhero! Jonny and Tommy Atomic are not like ordinary boys. Their dad is the most famous superhero in the world - making them pretty super too. That doesn't mean they don't have to go to school or tidy their room though. And they're definitely not allowed to use their powers or tell anyone their real identities...But while their dad is busy saving the world, again, no one realizes arch enemy Vinister Vile has a dastardly plan - can Jonny and Tommy stop him in time.