Mutiny on the Enterprise — Robert E. Vardeman

The ship is crippled in orbit around a dangerous, living, breathing planet, and a desperate peace mission to the Orion Arm is stalled. Kirk has never needed his crew more. But a lithe, alien woman is casting a spell of pacifism--and now mutiny--over the crew. Suddenly Captain Kirk's journey for peace has turned into a terrifying war--to retake command of his ship!