C C Poe: 2 books

In the city of Singularity, California, humans co-exist with advanced machines called "helots". When human terrorists attack a party celebrating the unveiling of the newest helot prototype, Chief Security Officer Shell and reporter Angel Martinez must try to survive the night and discover the reasons behind the attack.

In the city of Singularity, California, humans co-exist with advanced machines called "helots". Or they will, someday. Early in the city's development, Shell goes to Singularity to visit his old friend Root - but what he finds during his visit is disturbing information that makes Shell concerned for the city's future.