Rick Riordan comes through again, and this follow up to The Lightning Thief is just as entertaining, informative and action-packed as the first book. This time Percy (son of Poseidon) is at school in New York when things start to go downhill fast, beginning with some bad dreams about his friend Grover the satyr, followed by an attack by cannibalistic dodge ball players.
When Annabeth (daughter of Athena) arrives on the scene with more bad news, Percy has to embark on another quest, this time unsanctioned, to save Camp Half-Blood, which is vulnerable to attack since its defenses have been breached. He also has to save Grover, who's found himself in an inter-species entanglement in which he doesn't quite see eyes to eye with his suitor.
Accompanying them is Percy's class mate Tyson, a street kid who counts Percy as his only friend, but who is much, much more than he seems. The three travel to the treacherous Sea of Monsters in the face of insurmountable odds to capture the Golden Fleece, which hopefully can counteract the poison and restore the magical protection of the Camp.
Steeped in Greek mythology, yet written for young readers, this one is highly recommended for developing the imagination with its combination of thrilling adventure and legend.