Unknown Threat by Lynn Blackburn is about two U.S. Secret Service agents who are racing against the clock to find out who is murdering their fellow agents. US Secret Service Special Agent Luke Powell was on a run with a colleague when they were attacked. Luke barely made it out alive and his partner is in critical care. Luke’s attack has been one in a series of attacks against his colleagues. In the past ten weeks, three of his fellow agents had died in unusual circumstances.
Luke is shattered by the death and loss of his friends. He feels that it’s his personal mission to find the killer and find justice for his colleagues. Luke feels helpless that he can’t protect the people he loves, especially since they are good people who have spent their lives protecting others.
FBI Special Agent Faith Malone is driven and ambitious. She is confident that she will solve every case that she is assigned. However, when she is put in charge of the investigation of the attacks on Secret Service agents, she is worried that as she and Luke get to know each other on professional and personal levels, it raises stakes higher than any of her previous cases.
Faith and Luke have worked together before but he doesn’t feel that Faith is the right person for the job. He feels that his department should be handling the investigation since the attacks seem to be targeting his team. Faith feels that Luke is hiding secrets that could jeopardize the investigation and cause more people to get hurt. As more people they love are targeted, will Faith and Luke be able to put their disagreements aside and work together?
The book was a quick read. It was interesting to try and guess who the killer was and their motives behind the attacks. There weren't many clues and the story did feel slow at times. However, the ending seemed a bit weird to me and I thought the motive was a bit far-fetched. The romance element between the two characters felt a bit flat. There wasn’t much chemistry or cute moments between the two characters. I might read a few more books by this author but I wouldn’t go out of my way to get them.
