Black Fire is a Star Trek: The Original Series novel written by Sonni Cooper.

An explosion destroys the bridge of the Enterprise, killing trainee crewmembers and severely injuring the main crew.

His investigation soon leads him and the Enterprise's Chief Engineer Montgomery Scott to the discovery of the Tomarii, an alien race who reveres war and conflict.

Scott and Spock meet with a small grouping of Romulans and Klingons, all three races having been attacked.

Meanwhile, Spock has been framed for the explosion and Captain Kirk, recovering from his own wounds, must clear his friend's name.