Night Shift and Night Shadow by Nora Roberts

In The Still Of The Night

The calls came like clockwork — a cold, hate-filled voice telling late-night radio announcer Cilla O’Roarke that she was going to die. The never-ending threats had finally made her a believer. She was desperate — desperate enough to accept police protection.

Cilla preferred to keep her distance from the police, and she had her reasons. But there was something about Boyd Fletcher that made him difficult to ignore. He was strong, laconic, infuriating, and clearly determined to watch over her every second of the day — and night.

And the trouble was, the more Cilla saw of her unwanted bodyguard, the more she wanted him to share the night she loved…

NIGHT SHADOW

In A City Ruled By Fear

…a solitary figure shrouded in black walked the night, determined to awaken a terrified metropolis from the nightmare of crime. There was nothing — no bullets, and certainly not legal technicalities — that could deter the man they called Nemesis from his mission.

Deborah O’Roarke, an idealistic young prosecutor waging her own war against crime, owed Nemesis her very life. She shared his passion for justice, yet she could not accept his lawless methods. Still, though she fought her unwelcome desire for this disturbing stranger, she was unable to deny her longing to share the shadows that were his home…

After the night he saved Deborah O’Roarke from an attacker Nemesis rediscovered the sweet ache of longing. As Gage Guthrie, he could woo her. But the idealistic prosecutor abhorred his vigilante approach to crime-fighting. So how could he reveal he was the phantom who lurked in the Night Shadow?