Like Book One in the series, I thought it was just okay. I liked it slightly better than The Lightning Thief, and liked the character of Tyson, who was introduced in the beginning of the novel. 
 It turns out Tyson was a cyclops, which Percy didn't pick up on until he met Annabeth, who helped him figure it out. I don't particularly care for the being at a different school every year element, but at the same time, being at a new school every year seems to set up what happens the rest of the book. 
 I'm still not a fan of his writing style, and I honestly don't know if it's something that'll get better over the next 3 books. However, the storyline was interesting enough for me that I'm willing to overlook it. At least, for now, but that might change if I decide to read the rest of the series. 
 Rating: 2.5 out of 5. It is slightly better than The Lightning Thief, but I think I'm going to hold judgement on the series until I've finished reading all of them.