Yeah, really it's about Sarek's history, how he met Amanda, how he became Ambassador to Earth, and there's a whole Romulan plot thrown in too. I think the author is A.C. Crispin. But, see, the Romulans arrange to have Peter Kirk kidnapped and blame it on Klingons! In a dastardly, dishonourable plot! So he's also a prisoner of a beautiful Klingon warrior! So you can see where things go from there!