The Dissonance Factor. The Rik Sylver Sci-Fi Thrillers, #3

Walking away from the world never kept Rik Sylver out of trouble before and it didn't this time. Even working in a mining camp on Saturn's moon, Enceladus, didn't stop the transhumans of Omega Point reaching out across the Solar System and dragging him back into their world of danger and intrigue. A transhuman has been murdered and, somehow, this is tied to a covert plot within the US Government that has MI6 operative, Fariba Freymann, investigating against the orders of her superiors.
When the upload, Rivers Valdinger, is drawn into the operation, the action ratchets up a notch and the violence escalates. Rik, as ever, is well out of his depth but, as the scope of the conspiracy is finally revealed, he finds himself once more to be the only person with any chance of preventing a catastrophe. The Dissonance Factor is the third Rik Sylver novel.