Poltergeist (The Renascence City Chronicles Book 2)

Renascence City was once a thriving city protected by the hundreds of super heroes that roamed its streets. After all the super heroes were killed off, this burden fell to the police force, an institution that was both unprepared and prone to corruption. Now they're gone too and anarchy is left in their place.
As crooks and criminals go about their days unhindered while the rest of the people huddle in fear, one woman has a plan to help take back her city.
Tracy Night has spent the last four years of her life building her own personal humanoid robot. Now, with both time and money running out, it's time to put up or shut up.