Percy Jackson and the Olympians, Book Two: The Sea of Monsters (Percy Jackson & the Olympians) by Rick Riordan

Percy Jackson and the Olympians: The Sea of Monsters is the second book in Rick Riordan’s fantasy series. Percy Jackson returns for his second year at Camp Half-Blood, a sanctuary for demigod children. When the camp’s magical boundaries are compromised, Percy must journey to the Sea of Monsters (the Bermuda Triangle) to retrieve the Golden Fleece, which has the power to save the camp and restore its protective barrier. Alongside his friends Annabeth Chase and Tyson, his Cyclops half-brother, Percy faces various mythical creatures and challenges as they race against time to protect their home and unravel new mysteries.