The Ghost Network (book 1): Activate

The Ghost Network is a new, epic adventure series in which a group of teenage hackers get to work to save the world from disasters as man takes on machine. It's up to them to take down the wrongdoers in the Dark Web and beyond. Despite coming from different ends of the world, John, Slack, Akane, and Salome, aged 12, have plenty in common. They love computers, coding, hacking, gaming-it literally flows through their veins. One more thing: they are all technically dead. The group comes together at the Wolf's Den in deepest Alaska, one of several top-secret schools for technological excellence around the globe. The place seems like a coder's dream come true at first, but things take a dark turn when the group realizes they are not like the other kids there. They uncover that the center is working on a potentially dangerous, secret project known as Project 31. What's worse, the guinea pigs are the kids themselves. The gang realizes that John's father implanted artificial intelligence in their bloodstream, in order to protect them, before going missing under mysterious circumstances. They are not only wanted by those in power, but are now being hunted. There's only one way out: to escape across the brutal Alaskan tundra where the truth will be revealed.