Star Trek: the Original Series: Rihannsu: the Empty Chair

An electrifying thriller from bestselling author Diane Duane set in the Star Trek: The Original Series universe. The culmination of a saga twenty-two years in the making... They call themselves Rihannsu--the Declared. To the Federation, they are the Romulans. By any name they are adversaries as formidable as they are inscrutable. Self-exiled from Vulcan in ages past, they retain an ancient martial philosophy and a code of conduct...
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An electrifying thriller from bestselling author Diane Duane set in the Star Trek: The Original Series universe.

The culmination of a saga twenty-two years in the making...

They call themselves Rihannsu--the Declared. To the Federation, they are the Romulans. By any name they are adversaries as formidable as they are inscrutable. Self-exiled from Vulcan in ages past, they retain an ancient martial philosophy and a code of conduct that has sustained them through centuries of hardship, warfare, and thwarted ambition.

Now their empire is gearing for war once again. Armed with the revolutionary Sunseed technology, which can destabilize entire stars, a Romulan vessel is warping toward the heart of the Federation. Its target: Earth's sun.

But this offensive comes at a perilous time, as a growing number of Romulan worlds are joining a revolution--one led by the renegade Commander Ael t'Rllaillieu of the warbird Bloodwing, with the aid of Captain James T. Kirk of the Starship Enterprise(tm) and the Hamalki physicist K's't'lk, the Federation's foremost authority on Sunseed technology. As the threat to Earth looms ever larger, Bloodwing and Enterprise lead an armada toward the Romulan homeworld for a final reckoning that will decide the future of the Rihannsu people.