Rebel Mind (Book 1 of the Rebel series)

Rather than let defective Companion Violet 24 be killed, hardworking Citizen Cade Ishida uses all of his savings to buy her. And once he does, he has to face the truth: He might grow to love his Companion, but she can’t truly choose to love him back. Not with a chip in her head guaranteeing her loyalty to him and directing her every thought. But as Cade will soon discover, Violet is more than what she appears to be. So is the entire system of government on Earth. And his mysterious Companion might very well prove the key to both his heart and an interplanetary rebellion.