Catherine Asaro's most recent series set in her Skolian Empire continues with Major Bhaajan investigating the sudden disappearance of a wealthy woman from her own party. The house EI, (Evolving Intelligence), has no record of the exact minute she vanished and the destruction of the room almost looks like there was an explosion but there is no body or evidence that she left the house. Bhaajan has little to go on until another woman vanishes. Again the EI has no record and a woman in the next room heard nothing. This time the crime is personal for Lavinda Majda, the one royal that Bhaaj not only respects but actually likes. Thanks to her relationship with the crimelord Jak in the Undercity, Bhaaj slowly begins to unravel a conspiracy hidden among the Empire's elite. They are attempting to use ancient technology leftover from those who originally brought humans to Raylicon six thousand years earlier.
The Vanished Seas - Major Bhaajan series, book 3