Twilight's Children Series by Amanda Stevens

Together, can they find the Twilight Killer...Before he finds them? Special Agent Ethan Barrow's father was the most brilliant FBI profiler of all time. Now he's in a psychiatric ward, committed for the very crimes he cased. But new evidence leads Ethan straight to Detective Adaline Kinsella--the woman he had a past with ten years earlier. Addie can trust evidence...even if she can't trust the emotions Ethan elicits. Can she now put the past aside to bring the real Twilight Killer to justice?

Sometimes secrets are better left in the past Renowned anthropologist Catherine March fears she’s the biological daughter of a convicted serial killer. Tormented for years by nightmares and vague memories, she’d make a deal with the devil to investigate her mysterious adoption. Nick LaSalle eagerly takes the case, determined to prove someone is willing to kill to keep Catherine’s past buried... moreSometimes secrets are better left in the past Renowned anthropologist Catherine March fears she’s the biological daughter of a convicted serial killer. Tormented for years by nightmares and vague memories, she’d make a deal with the devil to investigate her mysterious adoption. Nick LaSalle eagerly takes the case, determined to prove someone is willing to kill to keep Catherine’s past buried. But when the evidence hits too close to Nick’s home, he has a choice to make—uncover the truth or protect his reputation and family name… less

Some things you never forget…Because they’ll never let you. Minutes after Arden Mayfair returns to her hometown, lawyer Reid Sutton appears on her doorstep. He warns her of the murder of a young woman, which closely resembles that of Arden’s mother. Reid may be the man Arden left behind, but he’s taking no chances with her safety. She could have seen her mother’s killer. And the heartbreaking past between them won’t stop Reid from protecting Arden with his own life.