Unknown Threat

Reviewed by:

Connor Salter, Professional Writing alumnus from Taylor University, Upland, IN.


Unknown Threat (Defend and Protect #1)


Lynn H. Blackburn


Revell (a division of Baker Publishing Group)

Publication Date:

March 2, 2021




336 pages


Secret Service Agent Luke Powell won’t stop until he discovers who left a bomb in colleague Thad Baker’s car. When shots are fired at Luke and another colleague while they’re out running, it’s clear that something bigger is going on. FBI Agent Faith Malone comes in to investigate the files on the Baker case and hopes her past history with Luke won’t prove to be a problem. They will have to do more than just meet halfway if they’re going to find the truth before another bomb goes off.

Blackburn gets a lot of leverage out of the rivalry between the FBI and the Secret Service, and by delving into the forensic details of a criminal investigation. This is one thriller where the investigation genuinely matters as much as the characters, and the technical details are well-researched. The plot juggles events well, creating intrigue and action throughout. The plot twists are also well-handled, taking the novel above standard fare into unexpected surprises.

The start of what looks to be an entertaining series.


Rating (1 to 5 stars)

4 stars

Suggested Audience

Christians who like crime thrillers with religious subtext.

Christian Impact

Several characters talk about faith, prayer and there is a subplot involving reconciliation with family members who have caused pain.

Unknown Threat (Defend and Protect, #1)

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