In the last book of the series, Percy Jackson wants to stop Kronos from taking over Olympus. When Kronos invades New York City, everything is chaos, but with the help of some friends, Percy is able to defeat Kronos.
I liked this book a lot, but it wasn't my favorite in the series. I really like how Rick Riordan's words flow together and make things sound good. I also really liked everyone's personality. It's not a book where everyone is happy all of the time.