Star Trek: Honor (Star Trek: Starfleet Corps of Engineers Book 58)

#58 STARFLEET CORPS OF ENGINEERS While repairing an observation post, P8 Blue and Domenica Corsi find themselves caught in the middle of an interplanetary conflict involving a pre-warp civilization -- with one side unwilling to fight, even to defend themselves. Unable to stand idly by and allow a slaughter to take place, Corsi and Blue must risk breaking the Prime Directive in a fight that they may not even win.... HONOR