The Heroes of Olympus

This first book of The Heroes of Olympus series introduces fifteen-year-olds Jason Grace, Piper McLean, and Leo Valdez, who are unaware that they are demigods until they are attacked on a school field trip and transported to Camp Half-Blood, where they also learn that Percy Jackson has disappeared and Hera has been imprisoned.

In this second book of The Heroes of Olympus series, Percy Jackson, Hazel Levesque, and Frank Zhang, recognized as the children of Roman gods at Camp Jupiter, journey to Alaska to free Thanatos, the god of death.

With help from Roman demigods, Annabeth must use her wits to retrieve the stolen statue of Athena. Now test your wits against these words from Rick Riordan.

In the fourth book of the Heroes of Olympus series, the Doors of Death must be found and closed. Rick Riordan uses these words to describe the demigods' adventures in the Underworld.

In the fifth book of the Heroes of Olympus series, a group of demigods battles against giants and the goddess Gaia, who is intent on destroying the earth.