What Lies Within - S.D. Tooley

For seventy years Sin Strip was the place to be in Chasen Heights, IL. It offered any decadence the heart desired. It was an age of self-indulgence that began a decline in 1995. But two weeks before the wrecking ball was to destroy one of the remaining landmark hotels, the police make a grisly discovery. Not all of Chasen Heights' secrets were destroyed when Sin Strip was closed down.
Sam has an advantage over other cops. The dead speak to her, tell her secrets about their life and death. But sometimes what she learns can get her killed. Book 5 in the series.