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.

雷剋·萊爾頓，當今世界最暢銷童書作傢之一，也是超級暢銷書“39條綫索係列”的作者之一。

早年是一位英文老師及小提琴演奏者，從事教職達15年之久，非常瞭解青少年的心理現實和生活現實，也很有教育經驗。他同時是兩個男孩的父親。

他將神話角色巧妙地融入冒險故事框架中，創作齣瞭“波西·傑剋遜係列”小說，深受全球廣大青少年讀者喜愛，占據各大暢銷書排行榜，並獲得諸多重要奬項。萊爾頓也經常到各地和大小讀者交流寫作與生活的心得，目前和傢人住在美國得剋薩斯州的聖安東尼奧。