Percy Jackson and the Last Olympian

Percy and Charlie are friends going on a dangerous, but minor quest at the beginning of this next Percy Jackson adventure. It takes place on a boat and they must destroy the boat to have a better chance of winning the war against the Titans. At first everything is okay, until they are caught. Do they die? Will they win? Who is the last olympian and why is the book called that? You can find out in the final book of  the Percy Jackson series.