Feed by M. T. Anderson

Titus and his friends all have "feeds". Feeds are brain implants which are connected to a computer network that runs 24/7 advertising everything Titus and his friends would ever want or need. Titus and his friends no longer have to speak verbally with one another. They communicate telepathically. The "feed" keeps everyone occupied and compliant. On a trip to the moon with his friends, Titus meets Violet. There's something different about Violet that catches Titus's attention. Violet has an older feed and has been home-schooled by her father who is a professor. When Violet contracts a virus that causes her feed to fail, she comes out fighting against the feed leaving Titus with a decision to make. Should he join Violet's rebellion?