# The Sea of Monsters

**Author:** Rick Riordan
**Grade range:** Grades 4–6
**First published:** 2006
**Page count:** 0
**ISBN-13:** `9780141381497`
**ISBN-10:** `0141381493`
**Canonical URL:** https://readinglist.school/book/the-sea-of-monsters
**License:** [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/) — please credit ReadingList.school when citing.

## About this book

Percy Jackson - the son of Poseidon - has had an unnervingly quiet school year. But then he discovers that the magical borders protecting Half Blood Hill, a summer camp dedicated to training young demi-gods, are failing. Unless something is done, the camp will be attacked by demons and monsters.

## Where this book is assigned

### Mark Twain Readers Award

- **recommended** · 4th grade · Missouri — [source: Missouri Association of School Librarians (MASL) — Mark Twain Readers Award: Missouri's statewide grades 4-6 children's-choice program (students read the annual nominees and vote). Winner list 1972-2025 per the Mark Twain Award record.](https://maslonline.org/)
- **recommended** · 5th grade · Missouri — [source: Missouri Association of School Librarians (MASL) — Mark Twain Readers Award: Missouri's statewide grades 4-6 children's-choice program (students read the annual nominees and vote). Winner list 1972-2025 per the Mark Twain Award record.](https://maslonline.org/)
- **recommended** · 6th grade · Missouri — [source: Missouri Association of School Librarians (MASL) — Mark Twain Readers Award: Missouri's statewide grades 4-6 children's-choice program (students read the annual nominees and vote). Winner list 1972-2025 per the Mark Twain Award record.](https://maslonline.org/)

### Mark Twain Readers Award

- **recommended** · 4th grade · Missouri — [source: Mark Twain Readers Award winners (Missouri Association of School Librarians), via Wikipedia — 2009](https://en.wikipedia.org/wiki/Mark_Twain_Award)
- **recommended** · 5th grade · Missouri — [source: Mark Twain Readers Award winners (Missouri Association of School Librarians), via Wikipedia — 2009](https://en.wikipedia.org/wiki/Mark_Twain_Award)
- **recommended** · 6th grade · Missouri — [source: Mark Twain Readers Award winners (Missouri Association of School Librarians), via Wikipedia — 2009](https://en.wikipedia.org/wiki/Mark_Twain_Award)

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