Battlestations! — Diane Carey

Back on Earth enjoying a well-deserved shore leave, Captain Kirk is rudely accosted by a trio of Starfleet Security guards. It seems he is wanted for questioning in connection with the theft of transwarp--the Federation's newest, most advanced propulsion system. Could Captain Kirk, Starfleet's most decorated hero, be guilty of stealing top-secret technology? With the aid of Mr. Spock,

Lt. Cmdr. Piper begins a desperate search for the scientists who developed transwarp--a search that leads her to an isolated planet, where she discovers the real--and very dangerous--traitor!