For the past 9 books, we have watched a 12-year-old boy growing up. From a 12-year-old who slew the Minotaur, to a 16-year-old who defeated Kronos with his friends. That boy is Percy Jackson. Then he went missing and 3 new demigods show up at Camp Half-Blood, and one of them is Roman. Then they locate Percy at the Roman demigod camp, Camp Jupiter. Percy makes 2 Roman friends. So Percy, Jason, Piper, Hazel, Leo, Frank, and Annabeth become the seven of the new great prophecy. This is the final battle, The Blood of Olympus by the genius Rick Riordan.

This time, the seven demigods of the prophecy will battle the giants with the help of their godly parents. Then, they must defend Camp Half-Blood from the rage of the 12th Legion of Camp Jupiter who has been ordered to march on the Greeks by Octavian the Roman son of Apollo. Read The Blood of Olympus by Rick Riordan.