1. Continue the story and develop characters: Rick Riordan aims to continue the adventures of Percy Jackson and his friends, deepening their relationships and pushing them further into the world of Greek mythology. This includes exploring the challenges of growing up, dealing with personal conflicts, and facing new threats.
2. Explore themes of friendship and loyalty: The book emphasizes the importance of strong bonds between friends and the sacrifices they are willing to make for each other. This is especially evident in Percy's unwavering loyalty to his friends, even when facing immense danger.
3. Introduce new aspects of Greek mythology: Riordan brings to life lesser-known myths and creatures, like the mythical sea monster Scylla and Charybdis, and explores the ancient Greek world with its diverse and fascinating pantheon of gods.
4. Provide exciting entertainment: The author seeks to create a thrilling and engaging read for young adults, combining action, suspense, humor, and adventure to keep readers on the edge of their seats.
5. Empower young readers: Through Percy's struggles and triumphs, Riordan aims to empower young readers to believe in themselves, embrace their unique abilities, and face challenges head-on.
Ultimately, Rick Riordan's purpose in writing *The Sea of Monsters* is to create a captivating story that entertains, educates, and inspires readers, weaving together the magic of Greek mythology with relatable characters and thrilling adventures.