Night Shadow by Nora Roberts

The provided text, excerpts from Nora Roberts' "Night Shadow," centers on the burgeoning relationship between Deborah O'Roarke, a dedicated Assistant District Attorney, and Gage Guthrie, a wealthy businessman with a mysterious alter ego known as "Nemesis." Deborah is fiercely committed to upholding the law, even as she is repeatedly thrust into dangerous situations, often unknowingly aided by Gage. The narrative reveals Gage's past as an undercover cop whose partner was murdered by a drug lord named Montega, leaving Gage with a unique, almost supernatural ability. As Deborah pursues justice in various cases, including a high-profile drug cartel investigation that implicates the city's mayor and his assistant, Jerry Bower, she frequently encounters Gage, who secretly uses his powers to protect her and pursue his own form of vengeance against Montega. The story explores their evolving romance, Deborah's struggle to reconcile her belief in the legal system with Gage's vigilantism, and their eventual partnership in both love and the fight for justice, culminating in the revelation of Gage's extraordinary abilities to Deborah and his family.