Night Shift first published in 1990. Night Shadow first published in 1991.

Night shift -- Night shadow.

Night Shift -- "Her voice was like whiskey, smooth and potent, but it was her contradictions that fascinated Detective Boyd Fletcher--the vulnerability beneath her tough-as-nails facade. Late-night radio announcer Cilla O'Roarke was being threatened by a caller, and it was Boyd's job to protect her no matter what. But the sultry deejay was getting under his skin, and the undeniable attraction that sizzled between them concerned the detective . . . because anything could happen on the Night Shift." Night Shadow -- "They called him Nemesis. He walked the dark alleyways alone, a shadow among shadows--and that's the way he liked it. Until the night he saved Deborah O'Roarke from an attacker and rediscovered the quiet ache of yearning lodged in his heart. It had been a long time since he had wanted to reach out to someone . . . But Deborah was an idealistic prosecutor who played by the rules and abhorred the vigilantism of her mysterious defender. Could she come to love the phantom who lurked in the Night Shadow?"--Back cover.