The second Amazon they met wasn’t so friendly. She was dressed in full armor, blocking the throne-room entrance. She spun her spear with lightning speed, but this time Percy was ready. He drew Riptide and stepped into battle. As the Amazon jabbed at him, he sidestepped, cut her spear shaft in half, and slammed the hilt of his sword against her helmet. The guard crumpled.

The Son of Neptune, Chapter XXXII