An action-packed, unofficial Minecraft adventure novel! Owen, Ella, Sean and Johnny thought they were just having fun beating Ender Dragons. Then one night helicopters suddenly appeared and whisked them away on a dangerous mission. Who knew they were actually being trained as secret agents? An evil group called CobraSquad is planning an attack on America, and they've hidden their plan inside a secret Minecraft world. Will the four friends--the Battle Masters--be able to find the secret message? Will the Battle Masters be able to stop CobraSquad before America plunges into darkness? In the spirit of Alex Rider and Percy Jackson, the Minecraft Masters series will delight young readers who love wild adventures...and Minecraft games.