Slave harvest - Andrew Butcher

The Sickness that ravaged the world is complete and only the children are left.

Having failed to resist the Scytharene alien attack, Travis and his friends are beamed on board spaceships, along with many other children - to become slaves. Just when it seems that there is no hope, help arrives from two unexpected sources: Darion, one of the Scytharene, who despises the destructiveness of his race. And a group of scientists, the last remaining adults, who have been hiding underground and have access to some serious weapons.

A mission like this will involve great sacrifice but will it be enough to end the terror of the Scytharene?