In preparation for the final battle against Kronos' army, Percy and his friends spent the year building an army of young demigods. However, they know that their chances are slim against the formidable Titans. And time is running out for Percy: soon, he will be sixteen years old and the prophecy will come true, he will have to make a decision putting the fate of the entire world in his hands. But beware of misleading oracles... “The final episode of the series begins with an explosion and continues with an impressive fireworks display. Fans will not be disappointed! »Publishers Weekly “The winning cocktail of thrilling adventures and devastating humor of the saga is enriched in this last part by human and ethical questions. Rick Riordan's imagination soars during breathtaking battle scenes. »Booklist OnlineFrom 11 years old