Neptune's brood Freyaverse Series, Book 2

The year is AD 7000. The human species is extinct--for the fourth time--due to its fragile nature. Krina Alizond-114 is metahuman, descended from the robots that once served humanity. She's on a journey to the water-world of Shin-Tethys to find her sister Ana. But her trip is interrupted when pirates capture her ship. Their leader, the enigmatic Count Rudi, suspects that there's more to Krina's search than meets the eye. He's correct: Krina and Ana each possess half of the fabled Atlantis Carnet, a lost financial instrument of unbelievable value--capable of bringing down entire civilizations. Krina doesn't know that Count Rudi suspects her motives, so she accepts his offer to get her to Shin-Tethys in exchange for an introduction to Ana. And what neither of them suspects is that a ruthless body-double assassin has stalked Krina across the galaxy, ready to take the Carnet once it is whole--and leave no witnesses alive to tell the tale... ϡ쯦랠

The year is AD 7000. The human species is extinct—for the fourth time—due to its fragile nature.
 
Krina Alizond-114 is metahuman, descended from the robots that once served humanity. She’s on a journey to the water-world of Shin-Tethys to find her sister Ana. But her trip is interrupted when pirates capture her ship. Their leader, the enigmatic Count Rudi, suspects that there’s more to Krina’s search than meets the eye.
 
He’s correct: Krina and Ana each possess half of the fabled Atlantis Carnet, a lost financial instrument of unbelievable value—capable of bringing down entire civilizations. Krina doesn’t know that Count Rudi suspects her motives, so she accepts his offer to get her to Shin-Tethys in exchange for an introduction to Ana.
 
And what neither of them suspects is that a ruthless body-double assassin has stalked Krina across the galaxy, ready to take the Carnet once it is whole—and leave no witnesses alive to tell the tale
 

The year is AD 7000. The human species is extinct--for the fourth time--due to its fragile nature. Krina Alizond-114 is metahuman, descended from the robots that once served humanity. She's on a journey to the water-world of Shin-Tethys to find her sister Ana. But her trip is interrupted when pirates capture her ship. Their leader, the enigmatic Count Rudi, suspects that there's more to Krina's search than meets the eye. He's correct: Krina and Ana each possess half of the fabled Atlantis Carnet, a lost financial instrument of unbelievable value--capable of bringing down entire civilizations. Krina doesn't know that Count Rudi suspects her motives, so she accepts his offer to get her to Shin-Tethys in exchange for an introduction to Ana. And what neither of them suspects is that a ruthless body-double assassin has stalked Krina across the galaxy, ready to take the Carnet once it is whole--and leave no witnesses alive to tell the tale... Speculative Fiction Krina Alizond is a metahuman in a universe where the last natural humans became extinct five thousand years ago. When her sister goes missing she embarks on a daring voyage across the star systems to find her, travelling to her last known location - the mysterious water-world of Shin-Tethys. In a universe with no faster-than-light travel that's a dangerous journey, made all the more perilous by the arrival of an assassin on Krina's tail, by the 'privateers' chasing her sister's life insurance policy and by growing signs that the disappearance is linked to one of the biggest financial scams in the known universe. This is set in the same universe as Saturn's Children, 5000 years later. After being stalked across the galaxy by an assassin, post-human Krina Alzon-114 journeys to the water-world Shin-Tethys in search of her sister.