Many series tend to go downhill after the first book; maybe the novelty of the premise has worn off, maybe the author is scrounging for material as they try to stretch the series out or maybe the author has to rush to meet deadlines. At any rate, there are a few new series that I'm really enjoying these days and Percy Jackson and the Olympians by Rick Riordan, just might be my favorite. I mean, come on, each book gets better and better!
The Battle of Labyrinth is the fourth book in the series, and it did not disappoint. I won't go into the plot here because if you've started the series I'm sure you're already addicted (everyone I can get to pick it up loves it, even if they are sure they won't). The books really do need to be read in order so if you haven't been reading the series yet, run out and pick up the Lightening Thief. Hey, why are you still reading this? I mean it! Go pick up the book!