This book is written by Rick Riordan who writes about Greek, Roman, Norse and Egyptian mythology. This book is in a series of 5 books and is the basis of the next book series the Heroes of Olympus which is followed by the trials of Apollo. As you can tell, these books have been popular and are a big success. Furthermore, there is also two movies but the books are far superior. I really enjoyed this book and so did many of my acquaintances. My favourite part of the book is when Percy fights Ares, the scene was an awesome fight-scene. Overall this was a good book and I recommend it to ages 9-14 as always, not that it would be a bad read for older readers. I would rate it a 4/5 The book had some predictability in some parts but it had a major twist that makes up for that short-coming. The reason why I chose to buy this book over all the other ones on the shelf was because of the cover. It drew me in and the story gripped me.