I love this book! Comparing this to the movie adaptation, some parts were missing and those parts should be included in the movie (too bad it's not). I'm looking forward to the next book, this series is recommended for all ages. Very exciting and because of this, I'm hooked in Greek Mythology and I want to read more about it. :) 
 Somehow I find Percy annoying, he's naive at times and somehow stubborn. The good thing about him is that he's brave and caring. I admire him that he's willing to sacrifice himself for his mom. But anyways, though I've watched the movie first before reading.. i feel bad about the movie. I haven't seen Ares. :| and Percy is 12 years old :P . If they are going to make the next movie.. I hope it's better than the first one ;)