Percy Jackson and the Sea of Monsters By Rick Riordan

 Percy's year at school has been uneventful and it's almost over. But all good things must come to an end after an attack at school. Camp Half-Blood is under attack too and Percy has a surprise relative.  Thalia's tree is in trouble and there is only one thing to save it.  This summer has got some nasty surprises for Percy. A few pleasant surprises. Along with memories to last him forever.

I recommend this to those who like the Lightning Thief and those who like an exciting story.