First Job by Lucas Flint

In a world where superheroes are a business, sixteen-year-old Alex Fry gets the dream job of teenagers everywhere when he is hired by the famous superhero Rubberman as his sidekick. As Rubberman's sidekick, Alex hopes to not only learn how to use his powers, but also save up enough money to buy his first car before he heads off to college.

But Alex gets more than he bargains for when a powerful supervillain with mysterious connections to Rubberman's past appears in his city with a dangerous agenda. Now Alex must master his powers in time to help Rubberman defeat this supervillain before he succeeds in his vile plans.

Yet when Alex learns about the darker side of the superhero industry, he finds himself unsure whether to keep working for Rubberman or to stand against him for the greater good. If Alex makes the wrong choice, it will change his life—and the fate of his hometown—forever.