There are 290 pages in the Percy Jackson Sea of monsters book. I assume that's the book you were asking about.
Paperback : 304 pages .
First of all it's called the Sea of Monsters, if you are wondering. There are 279 pages.
279
279 pages
The Coral Sea - book - has 72 pages.
279
the book the green glass sea has 336 pages.
If purchased for iPad the book has 256 pages.
Lightning Theif: 375 pages Sea of Monsters: 279 pages Titan's Curse: 312 pages Battle of the Labrinth: 361 pages The Last Olympian: 381 pages The books aren't very long compared to the new series.- 'Heroes Of Olympus'.
a lot
The hardcover version has 288 and the paperback has 304.
Here let's see: Lightning Thief: 337 pages The Sea of Monsters: 279 pages The Titan's Curse: 312 pages The Battle of the Labyrinth: 361 pages The Last Olympian: 381 pages Hope this helps! ~*~