The Sea of Monsters (Percy Jackson and the Olympians, Book 2)

The second book in Rick Riordan’s #1, New York Times best-selling saga, Percy Jackson and the Olympians—the perfect accompaniment to Season Two of the Disney+ series!

After a summer spent trying to prevent a catastrophic war among the Greek gods, Percy Jackson finds his seventh-grade school year unnervingly quiet. His biggest problem is dealing with his new friend, Tyson—a six-foot-three, mentally challenged homeless kid who follows Percy everywhere, making it hard for Percy to have any “normal” friends.

But things don’t stay quiet for long. Percy soon discovers there is trouble at Camp Half-Blood: the magical borders which protect Half-Blood Hill have been poisoned by a mysterious enemy, and the only safe haven for demigods is on the verge of being overrun by mythological monsters. To save the camp, Percy needs the help of his best friend, Grover, who has been taken prisoner by the Cyclops Polyphemus on an island somewhere in the Sea of Monsters, the dangerous waters Greek heroes have sailed for millennia—only today, the Sea of Monsters goes by a new name…the Bermuda Triangle.

Now Percy and his friends—Grover, Annabeth, and Tyson—must retrieve the Golden Fleece from the Island of the Cyclopes by the end of the summer or Camp Half-Blood will be destroyed. But first, Percy will learn a stunning new secret about his family—one that makes him question whether being claimed as Poseidon’s son is an honor or simply a cruel joke.

BUY THE BOOK

Published Apr 1, 2007

288 pages

Average rating: 8.16

300 RATINGS

|

Community Reviews

What Bookclubbers are saying about this book

✨ Summarized by Bookclubs AI

Readers say *The Sea of Monsters* deepens the mythological adventure with humor, engaging characters like Percy and his half-brother Tyson, and a fast...

chazzareads
Feb 28, 2023
6/10 stars
Good stuff here. More myth and a thickening plot in the second installment of Percy Jackson & the Olympians makes this book even better, I think, than the first. I particularly enjoyed the cliffhanger ending, the humorous explanation of how retail chains spread so quickly, and the action spread through the novel from the very get-go.

Perhaps what I found most touching and realistic was the subtle message to kids that they ought to look beyond exterior appearances and learn to appreciate someone for who they are and the kind of heart they have.
Melissa Daugherty
Oct 26, 2025
10/10 stars
I love this one. I am sorry I waited so long to read the series. It keeps getting better and better. I am on to the next one
JaneRose0514
May 02, 2025
8/10 stars
Okay, this book was great but not really great. Well, I am just unhappy because I thought that it would be more exciting than I expected but it was great. I like the character also Tyson, who is Percy's half-blood brother. Also, this book has adventures too like Thalia's tree is poisoned by Luke but in the end, Percy and his friends save Thalia's tree and they need to take the fleece from the Cyclop island. Percy dreams in Grover that Grover needs help and then they board Princess Andromeda. While they are going to save Grover, they met Luke, Circe, the Island of Cyclop, and oh also monsters. But the book is still enjoyable to read and also funny.
Barbara ~
Dec 11, 2024
6/10 stars
You find out what Percy's and Annabelle's weaknesses are. That's important for the later novels. Grover get's married, Percy finds a half-brother and Annabelle is still a delightful thorn to Percy. You get a glimpse as to why Charisse is the way she is. Good reads.
Klaraar
Dec 03, 2024
10/10 stars
Best book ever. I really need to read book 3.

See why thousands of readers are using Bookclubs to stay connected.