Once I had read Book 1: 'The Lightning Thief' I was hooked. I mean I was literally obsessed with everything 'Percy Jackson' EXCEPT FOR THE MOVIES!... Anyway it's a great book! You should totally read it!
I like all PJO and HoO book series.
I really recommend you read the book first because the film is kinda different.
Spoiler Alert:In the book the "Cursed Blade" was referred as Annabeth's Knife but in the film Percy's sword Riptide is the "Cursed Blade".
Anyway,the book still ROCK!!!