Two brothers. One mystery.

Only a year had passed. Max was still trying to cope with not having a father. On top of that, he discovered Jack was a spy and that his father's death wasn't an accident. Someone was out to get him. And they aren't finished yet.

In this emotional, action-packed thriller, Max and Jack will uncover secrets that will change everything they knew about the world of spies.

"Welcome to Skyline."