Superposition Series by David Walton

Jacob Kelley's family is turned upside down when an old friend turns up, waving a gun and babbling about an alien quantum intelligence. The mystery deepens when the friend is found dead in an underground bunker…apparently murdered the night before he appeared at Jacob's house. Jacob is arrested for the murder and put on trial... moreJacob Kelley's family is turned upside down when an old friend turns up, waving a gun and babbling about an alien quantum intelligence. The mystery deepens when the friend is found dead in an underground bunker…apparently murdered the night before he appeared at Jacob's house. Jacob is arrested for the murder and put on trial.  As the details of the crime slowly come to light, the weave of reality becomes ever more tangled, twisted by a miraculous new technology and a quantum creature unconstrained by the normal limits of space and matter. With the help of his daughter, Alessandra, Jacob must find the true murderer before the creature destroys his family and everything he loves. From the Trade Paperback edition. less

Ryan Oronzi is a paranoid, neurotic, and brilliant physicist who has developed a quantum military technology that could make soldiers nearly invincible in the field. The technology, however, gives power to the quantum creature known as the varcolac, which slowly begins to manipulate Dr. Oronzi and take over his mind. Oronzi eventually becomes the unwilling pawn of the varcolac in its bid to control the world... moreRyan Oronzi is a paranoid, neurotic, and brilliant physicist who has developed a quantum military technology that could make soldiers nearly invincible in the field. The technology, however, gives power to the quantum creature known as the varcolac, which slowly begins to manipulate Dr. Oronzi and take over his mind. Oronzi eventually becomes the unwilling pawn of the varcolac in its bid to control the world.The creature immediately starts attacking those responsible for defeating it fifteen years earlier, including Sandra and Alex Kelley—the two versions of Alessandra Kelley who are still living as separate people. The two young women must fight the varcolac, despite the fact that defeating it may mean resolving once again into a single person. less