The Last Olympian

When every one believed Percy Jackson was the Half Blood who would fore fill the great prophecy he left camp with his friend Nico to prepare for battle so he wouldn't get killed. However Nico decided to make a deal with his father also. The deal was if Nico could bring Percy to Hades so they could talk Hades would tell Nico about his mother. Nico still wanted to help Percy so even though Percy called Nico a traitor, Nico took Percy to the the river of Styx. There Percy changed and became impossible to beat in battle he gained strength, speed , and power. When Nico and Percy returned from the underworld they called camp half blood to them to protect Olympus and save the world. Even though most of the gods were out trying to defeat Typhon father of all monsters, or like Poseidon defending there home, the half bloods came up with the plan to defeat Kronos.  Percy called to his father so he could ask for his help and even Nico convinced Hades to help fight in the war. Eventually they won the war and celebrated. However  Kronos is not dead and  will return eventually. Until then read the next book.