Edge of the Sword, Star Trek: The Original Series

A thrilling Star Trek adventure novel featuring Captain Kirk and members of the original crew as they face an unknown phenomenon headed to destroy a planet and its possible origins of a past coming back to haunt them.

Lt. Jon Anderson is the newest security officer aboard the U.S.S. Enterprise. He joins the crew at a time of mounting tension between the Federation and the Klingon Empire. Previous battles have been inconclusive, but Starfleet Command fears that the Klingons are gearing up for a major offensive. The Enterprise would be on the front lines of an all-out interstellar war.

But Lieutenant Anderson has a secret: he is actually a Klingon infiltrator assigned to sabotage Starfleet from within. His first mission: kill Capt. James T. Kirk.