Inspired by Soon I Will Be Invincible? Try these ---

I was thinking about how some readers really enjoy books about superheroes, and realized I should have mentioned these, by Adam Christopher.   You can find all three of them in our SF-F section here at the Library.
Empire State:  "The stunning superhero-noir fantasy thriller set in the other New York.  It was the last great science hero fight, but the energy blast ripped a hole in reality, and birthed the Empire State – a young, twisted parallel prohibition-era New York. When the rift starts to close, both worlds are threatened, and both must fight for the right to exist."   (summary courtesy of Goodreads).
The Age Atomic -- the sequel to Empire State, 

and Seven Wonders.   This one isn't a sequel, but it's still got the superhero/villain vibe.