Not bad! Not bad at all, following a rather disappointing first book in the series. The characters are likeable, capable, and rely less on luck to succeed in their quest. Percy Jackson is one hell of a leader, a fighter and a friend, but does not in any way overshadow the other characters Frank and Hazel. Frank and Hazel have their own dilemmas and problems, which not only makes the sadistic side of me get really really hyped up, it also gives me a chance to relate to them. They are, after all, (part) human. Who says their life as gods is easy? Cool, yes though. A tonne of suspense which makes me really excited for the third book. 
 Thank god (no pun intended) i didn't give up after reading the first book! If Percy is present further down the series, I'm already in full attack-the-bookstores mode. Percy Jackson over Jason any time! (Sorry, Jason fans out there)