Other
Read Riordan: Official Web Page
This is the official site for Rick Riordan which offers articles and quizzes about his books including Percy Jackson and the Olympians and Magnus Chase and the Gods of Asgard.
Scholastic
Scholastic: Discussion Guide: The Sea of Monsters
Scholastic presents this discussion guide of "The Sea of Monsters" by Rick Riordan. The guide includes discussion questions, extension activities, and more.