The Maze: An FBI Thriller, Book 2

Lacey Sherlock's life takes a dramatic turn when her older sister's body is found, a victim of the notorious String Killer. Seven years later, as an FBI agent, Lacey teams up with tech-savvy Dillon Savich to unravel a new case linked to the killer. When a suspect confesses but denies responsibility for her sister's murder, Lacey's investigation leads to attempts on her life, compelling her and Dillon to uncover the truth before they become the next targets.