"Revenge of the McNasty Brothers" by Greg Trine (author), Rhode Montijo (illustrator) (Melvin Beederman Superhero, Book 2)

Bad guys tremble at the sound of his name!

Crime is at an all-time low in Los Angeles--but not for long. The McNasty Brothers have escaped from prison, and they want REVENGE. The superheroes need all their noggin power, and a little help from a pretzel-loving rat, to capture the baddest-smelling villains around.