So you're wondering about follow-ups to 'The Emperor's Daughter'! I get it, that ending left a lot of us wanting more. As far as I can tell, there isn't a direct, officially-titled sequel that continues the main character's story immediately after the final chapter. The author, S.J.A. Turney, has written a ton of other books set in different historical periods, but 'The Emperor's Daughter' stands on its own.
However, if you're craving more of that Byzantine-era intrigue, Turney's 'Mercenary' series is a fantastic place to go next. It's not a sequel, but it shares a similar feel—political machinations, military campaigns, all that good stuff. It’s like moving to a different neighborhood in the same vast historical city. I tried jumping from one to the other and found the transition pretty smooth, though the tone is a bit grittier.
Honestly, I kinda prefer that it’s a standalone. Not every story needs to be stretched into a trilogy, you know? Sometimes a single, complete arc hits harder. But yeah, for more Turney, check his bibliography—the reading order for his other series is usually chronological by publication.