In "The Lightning Thief," a conversation unfolds between the characters about how Galdoila is aware of a reward. Through this dialogue, it's revealed that Grover possesses a deeper understanding, stating that Galdoila "reads the signs." This statement emphasizes the idea that some characters are attuned to subtle cues in their environment, which can convey important information that others might overlook.

The character's response, "Duh," suggests a moment of realization, indicating that recognizing these signs should have been apparent. This exchange highlights themes of perception and awareness in the story, showcasing how knowledge can be gleaned from one’s surroundings—a recurring motif in Riordan's narrative.