The Superhero's Glitch by Lucas Flint

While exploring one of his father's abandoned Vaults, Kevin Jason (Bolt) discovers a fully immersive, virtual reality world designed to mimic popular MMORPGs.

What starts off as a fun game quickly becomes far more serious when his AI assistant, Valerie, is kidnapped by a dangerous virus. This virus has only one goal: To escape onto the Internet and destroy the world.

Now it is up to Bolt and a handful of other players to enter the Vaultwork, save Valerie, and stop the virus before it's too late. But there is more to the game than
meets the eye and Bolt may not be prepared to handle the secrets and revelations awaiting him within.