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Cover of The Sea of Monsters

Fantasy · Young adult · Children's

The Sea of Monsters

by Rick Riordan

4.0 out of 5, from 2,064 ratings from Hardcover readers

The second Percy Jackson book. When the magic that protects the demigod summer camp starts to fail, Percy and his friends sail into a sea of mythological monsters to find a legendary item that could save it.

Facts last checked 2026-10-16

First published
2006
Pace
Fast
Length
Medium
Pages
279
Format
Book 2 of 7 in Percy Jackson and the Olympians
Borrow free with Libby Compare prices Save to my shelf

Read this if you like quick, funny adventures that remix Greek myth with a modern twist for younger readers.

Skip this if you haven't read the first book, as the characters and rules are set up there.

The feel

Content warnings

  • Violence

Also reported by Hardcover readers:

  • Abandonment
  • Ableism
  • Bullying
  • Blood
  • Grief
  • Gaslighting

Quick answers about The Sea of Monsters

What is The Sea of Monsters about?
The second Percy Jackson book. When the magic that protects the demigod summer camp starts to fail, Percy and his friends sail into a sea of mythological monsters to find a legendary item that could save it.
Who should read The Sea of Monsters?
Read it if you like quick, funny adventures that remix Greek myth with a modern twist for younger readers. Skip it if you haven't read the first book, as the characters and rules are set up there.
How long and how fast is The Sea of Monsters?
It is a fast-paced, medium read of about 279 pages, first published in 2006.
Does The Sea of Monsters have content warnings?
Content we flag: Violence.
Can I borrow The Sea of Monsters for free?
Often, yes. Check Libby (OverDrive) to see whether your library lends The Sea of Monsters; the borrow button above searches it for you.
What should I read after The Sea of Monsters?
Readers who liked it often move on to Harry Potter and the Prisoner of Azkaban, The Lion, the Witch and the Wardrobe, Fablehaven.

Where to get it

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