All year the half-bloods have been preparing for battle against the Titans, knowing the odds of victory are grim. Kronos's army is stronger than ever, and with every god and half-blood he recruits, the evil Titan's power only grows. While the Olympians struggle to contain the rampaging monster Typhon, Kronos begins his advance on New York City, where Mount Olympus stands virtually unguarded. Now it's up to Percy Jackson and an army of young demigods...

After learning that humans are headed toward his hidden home, Firedrake, a silver dragon, is joined by a brownie and an orphan boy in a quest to find the legendary valley known as the Rim of Heaven, encountering friendly and unfriendly creatures along the way, and struggling to evade the relentless pursuit of an old enemy.

When Jake Mendoza, who lives in the Smokehill National Park where his father runs the Makepeace Institute of Integrated Dragon Studies, goes on his first solo overnight in the park, he finds an infant dragon whose mother has been killed by a poacher.

After finding a pebble and working together to make it special, a dragon and a phoenix watch over it forever.

Skull, the Shadow, and a few of the rat army escaped into Perodia, and now Tag and the other defenders must locate them, and also find their friend, Bod, who is still trapped in the Underland with the rest of the rat army.