Suddenly Annabeth materialized on the drakon’s back. Her invisibility cap rolled off her head as she drove her bronze knife between a chink in the serpent’s scales. The drakon roared. It coiled around, knocking Annabeth off its back. I reached her just as she hit the ground. I dragged her out of the way as the serpent rolled, crushing a lamppost right where she’d been. “Thanks,” she said. “I told you to be careful!” “Yeah, well, DUCK!” It was her turn to save me. She tackled me as the monster’s teeth snapped above my head.