Book Review: Unknown Threat

24 Nov

Unknown Threat is book 1 in Lynn Blackburn‘s romantic suspense series, Defend And Protect. It’s a puzzler, as members of the US Secret Service are targeted by a killer. It’s a great start for the series. Recommended! Find out all the details below.

US Secret Service Special Agent Luke Powell is lucky to be alive. Three of his fellow agents have died in unusual circumstances in the past ten weeks. Luke is devastated by the loss of his friends and colleagues, and his inability to locate the killer feels like a personal failure. He’s an expert at shielding others, but now the protectors are in need of protection.

FBI Special Agent Faith Malone is driven to succeed and confident in her ability to solve every case she’s assigned. She’s been put in charge of the investigation into the unprecedented attacks, and with Luke’s life in danger, the stakes have never been higher. But it’s hard to know how to fight back when you don’t know who the enemy is.

As more agents are targeted, Luke and Faith will have to work together to bring a killer to justice and prevent any more names from joining their fallen brothers and sisters on the Secret Service Wall of Honor.

Lynn H. Blackburn loves writing romantic suspense because her childhood fantasy was to become a spy, but her grown-up reality is that she’s a huge chicken and would have been caught on her first mission. She prefers to live vicariously through her characters and loves putting them into all kinds of terrifying situations while she’s sitting at home safe and sound in her pajamas! 

Lynn’s titles have won the Carol Award, the Selah Award, and the Faith, Hope, and Love Reader’s Choice Award. Her newest series kicked off in March 2021 with Unknown Threat, Book 1 in the Defend and Protect series. 

She is a frequent conference speaker and has taught writers all over the country. Lynn lives in South Carolina with her true love and their three children. You can follow her real life happily ever after by signing up for her newsletter at and @LynnHBlackburn on Bookbub, Facebook, Twitter, Pinterest, and Instagram.

My Impressions:

Lynn H. Blackburn’s novel Unknown Threat starts out with a bang! Literally. The reader is immediately grabbed with this twisting romantic suspense that features the Secret Service and the FBI. Not known for working well together — interagency rivalry, you know — the two law enforcement agencies are forced to cooperate as Secret Service agents are murdered. The case is puzzling, because the methods are so different, but FBI agent in charge, Faith Malone, is dogged in her working of the case. And Secret Service agents won’t remain on the sidelines when their fellow agents are targeted. SA Luke Powell and Faith are thrown together to identify who is responsible. The romance between the two main characters is new, no past bad blood, and I liked that. That’s not to say that their relationship didn’t sizzle. LOL! The investigation is a puzzler, and the two are kept on alert as more threats and dangers emerge. I found the case intriguing and was kept guessing as to just whodunit. Blackburn’s novels are faith-filled, but never preachy. The reader gets real and relatable people and their struggles. And for fans of Blackburn’s previous books, a couple of favorite characters make cameo appearances.

If you are looking for a fast-paced suspense with a good dose of romance, then I recommend Unknown Threat.


Audience: Adults.

(Thanks to Revell for a complimentary copy. All opinions expressed are mine alone.)

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