The Final War

The nine worlds are in danger. Again. But this threat is worse - way worse - than Gaea, Loki, Kronos and Ragnarök.

Magnus thought he was done with demigod business. He was wrong. Can't an einherji live a peaceful life? Yeah, he was dead, but still. What did the einherjar have to train for now? He had stopped Ragnarök, and he had defeated Loki, the god of mischief.
But an old friend of his decided to show up again to ruin the party.

Percy thought he was done fighting monsters and gods. He just wanted to live with Annabeth in New Rome, happily ever after. But no. A few weeks after he had met Annabeth's cousin, Magnus, the gods - and he meant ALL the gods - got into another sticky situation.

Percy and Magnus have to work together to stop a threat that could mean the end of their lives - and the other billions of lives that count on them.

Can these two unfortunate demigods stop, or win, the war that is about to erupt?

All characters belong to Rick Riordan