The Sea of Monsters

The Sea of Monsters
Cover of unknown later US edition with Rocco illustration (same as first ed.)
AuthorRick Riordan
Cover artistJohn Rocco (depicted)
SeriesPercy Jackson & the Olympians (book 2)
Genre
PublishedApril 1, 2006
PublisherMiramax Books and Disney Hyperion
Publication placeUnited States
Media typePrint (hardcover and paperback), audiobook, e-book
Pages279
ISBN0-7868-5686-6
OCLC64664383
LC ClassMLCS 2006/45756 (P)
Preceded byThe Lightning Thief 
Followed byThe Titan's Curse 

The Sea of Monsters is a 2006 children's novel based on Greek mythology by the American author Rick Riordan. It is the second novel in the Percy Jackson & the Olympians series and the sequel to The Lightning Thief. This book chronicles the adventures of thirteen-year-old demigod Percy Jackson as he and his friends rescue his satyr friend Grover from the Cyclops Polyphemus and save Camp Half-Blood from a Titan's attack by bringing the Golden Fleece to cure Thalia's poisoned pine tree.

The Sea of Monsters was released on April 1, 2006, by Miramax Books, an imprint of Hyperion Books for Children, and thus Disney Publishing (succeeded by the Disney Hyperion imprint). It was generally well–received and was nominated for numerous awards, including the 2006 Book Sense Top Ten Summer Pick and the 2009 Mark Twain Award. It sold over 100,000 copies in paperback with over one million copies total and was released in audiobook format on September 6, 2006. The Sea of Monsters is followed by The Titan's Curse, the third book of the five books in the series.

Percy Jackson: Sea of Monsters, a film adaptation of the book, was released on August 7, 2013. The book was adapted for the second season of the Disney+ television series Percy Jackson and the Olympians; it premiered on December 10, 2025.