The Sea of Monsters by Rick Riordan (Book 2 of the Percy Jackson & the Olympians series)

Percy's seventh-grade year is barely peaceful before Camp Half-Blood is threatened by a poisoned magical border and Grover disappears. To save the camp, Percy, Annabeth and Tyson sail into the Sea of Monsters in search of the Golden Fleece, facing ancient dangers and a shocking truth about Percy's family.

• Publisher: Puffin
• Language: English
• Paperback: 304 pages
• ISBN-13: 9780141346847