The last Olympian By Rick Riordan

This is the last Percy Jackson adventure which led to the Heroes of  Olympus series.The last Olympian is about Kronos coming back taking over New York city and making it the New underworld. Percy Jackson and the rest of the crew try to take down Kronos and save New York before he takes over the world! What Percy Jackson and the rest of the team have to do is to take on all the Boroughs from Staten island to Brooklyn. This book is amazing  and it is the last Percy Jackson book so everything change between Annabeth,Grover,and Tyson.