Tempus Ordo Mortis (en Inglés) - A D McCabe

Time Bends. Death Remembers.

Once a Knights Templar, Emile Augustus, was hard, and cruel. Now a Tempus Militibus vampire of the Sixth, he is a gifted swordsman and a man who is shaped by mortality before immortality remade him into something far more dangerous.

When a rogue vampire mercenary named Azratuq resurfaces, Emile begins a private hunt that quickly becomes something older than revenge. He discovers truths that are buried deep, lies that are written. Secrets so deep he begins to question everything.

Then he meets Constance. Mortal. Determined. Unavoidable.
She should mean nothing whatsoever to him, but she does. Constance becomes a contradiction he cannot resolve.

When Azratuq targets her, Emile is forced to reveal what he truly is and what he has become. Drawn into his dark and volatile world, Constance does not soften him. Instead, she unsettles him, exposing fractures he has spent centuries controlling. Memories he had chosen to forget.

Now Emile must face a truth more dangerous than any enemy
Even the coldest vampire can burn.