Mistress of War: Book 2. The Eburosi Chronicles, #16

Everything I thought I knew about Emperor Kaeto was completely wrong Well. not quite everything. He's still a bitter, acerbic bastard with a chip on his shoulder the size of a continent. He still fascinates and infuriates me in equal measure. But my quest to retrieve the stolen dragon eggs has somehow morphed into a quest to return Kaeto to his stolen throne. And by doing so, I've put those I care about in mortal danger. Our flight to safety in my aunt and uncle's kingdom of Utrea succeeded only in bringing spies and assassins to my family's doorstep.
As we struggle to stay one step ahead of Brucius' Alyrian mercenaries, a new, more primal threat may hold the key that changes everything. We just have to stay alive long enough to make use of it. -o-o-o- Mistress of War is an enemies-to-lovers epic fantasy with an allo-aro main character, a demi love interest, and explicit steamy scenes. As the final series arc in the Eburosi Chronicles, the trilogy is loosely linked to the other Eburosi series by characters and settings.
It can be read on its own. If your love language involves receiving your enemy's severed head on a pike, Darra and Kaeto just might be the literary couple for you.