Last year, Percy Jackson managed to stop the Olympian gods declare war on each other. But the battle hasn’t finished yet; now Kronos, one of the overthrown Titans, is influencing a half-blood, and he wants to remove the Olympians from their seats of power. First stop for Kronos? Camp Half-Blood. Thalia’s tree has been poisoned, and with it the boundary line is fading. Soon, Camp Half Blood will be overrun, and the half-bloods will have nowhere safe to go. It’s up to Percy and Annabeth to save not only Camp Half Blood, but also Grover, who is in mortal danger…. Percy Jackson and the Sea of Monsters is the second in the Percy Jackson series, and is just as good as Percy Jackson and the Lightning Thief. As soon as I finished book one, I started this one, and I found it unputdownable.