The Cry of the Onlies (Star Trek, Book 46)

Negotiations between Captain Kirk and the ruling Council of Youngers on the planet Boaca Six are shattered when a Boacan vessel is destroyed--by an experimental Federation ship. In order to prevent full-scale war, the Enterprise must recapture the stolen Starfleet vessel and confront the galaxy's most r eclusive genius and long-buried secrets of Kirk's past.