This book is a really special one for the Percy Jackson fans . Some were really unsatisfied with the really incomplete ending of Leo , Piper and Jason's friendship in BLOOD OF OLYMPUS ........So this can be the next book to read . This book revolves around the old grudge between the clever Athena (goddess of wisdom) and the mighty Poseidon (god of seas) . This fight takes a toll on Percy and Annabeth's relationship.More trouble comes on Percy when an entry of a new character, Calypso who had a crush on him, because of a curse , enters.To find out how they work out, read on..The book has many 'OMG,NO!!!' and 'THANK GOD' instances . Hats of to Rick's novels (my inspirational source.)..