The Battle for Olympus

Percy was still too far away to hear, to know what was happening, and likely he wouldn't care. Annabeth's breath caught in her throat and the crowd faded, the voices just white noise. There was only Percy, his hair shaggy and swept to the side, his mouth drawn up in his troublemaker smile. Her body ached to return to him, he was so close. But if she was right, that would be a deadly mistake.
Annabeth turned back to Jason. "You sold us out didn't you."
"There's only one way to end the schism, Annabeth," Jason said. His remaining eye gleamed. "The Greeks must be wiped out."
Reyna raised her hand. "Seize them."
"Jason!" Piper cried as two legionaries grabbed her arms. "How could you!"
Annabeth grit her teeth but didn't struggle. They couldn't win this fight. And the worst part? She totally saw it coming.

This is an au where Jason turns the Greeks over to the Romans instead of cooperating, and the resulting conflict ensues. Can the Greeks and Romans work together? Or will they both be torn apart in the end.

Cover Art Credit:
Hazel, Nico, Piper, and Reyna: @silima.art on Instagram, silima on tumblr
Percy: @gabrielles_artwork on Instagram
Frank: alecian on tumblr
Jason: blanc-ci on tumblr
Leo: skidar on tumblr

All characters belong to Rick Riordan