Unstoppable: Super Hero Academy, Book 5 (Unabridged‪)‬

The Carter villain school has fled into space and joined forces with the Mad King of New Sahana, but Nick and his fellow heroes-in-training won't let them get away. It's a superpowered battle among the stars, and the stakes have never been higher.

But when Nick and his team arrive on New Sahana, nothing could prepare them for what they find. Super-charged genocidal soldiers would be one thing, but nothing could prepare them for alien ghosts, a growing blight, and worst of all, a threat from within that threatens to tear the team of heroes apart.

Not that Nick can let all that stop him. To decide the fate of two worlds and protect the women he loves, he will have to lead the charge through an alien world, finally defeat his nemesis once and for all, and break through every one of his power's barriers to become truly unstoppable!