Sidekick Simmons: Enemies and Allies - Part 1, Book 1 by PM Paggy

There’s nothing super about Simon Simmons—except that he works for a superhero. 12-year-old Simon has been chosen to become the assistant to the Amazing Miraculous, the superhero for North America. Unfortunately, Simon has never paid much attention to the details of superheroes’ lives, so he gets a crash course when he and his family move into the superhero’s main lair.