Annabeth ran away from her father and stepfamily at age seven and encounters Luke Castellan and Thalia Grace. They live as runaways until they are found by Grover Underwood and taken to camp. Annabeth remains attached to Luke and convinced of his goodness even after his decision to support Kronos. Her attempts to bring Luke back into the fold are an important theme in the books. Annabeth is crucial to the plot of each book in the Camp Half-Blood Chronicles, in various ways. She leads quests in The Battle of the Labyrinth and The Mark of Athena. She is taken to Mount Tamalpais/Othrys by the manticore during a fight in The Titan's Curse and is subsequently kidnapped and used as bait to lead Goddess Artemis into holding the sky instead of the Titan Atlas. She also spends some time in Tartarus with Percy and Bob the Titan during the House of Hades. At the end of the series, she and Percy plan to finish high school in New York and then attend college in New Rome. In The Hidden Oracle, Percy states that Annabeth had gone to Boston for "some family emergency"—searching for her cousin Magnus Chase. Annabeth's appearances in crossover shorts with The Kane Chronicles, and in Magnus Chase and the Gods of Asgard making her the only character besides Percy Jackson to have appeared in all three of the Greco-Roman, Egyptian, and Norse mythology series by author Rick Riordan.