In The Son of Neptune, Percy, Hazel, and Frank met in Camp Jupiter, the Roman equivalent of Camp Halfblood, and traveled to the land beyond the gods to complete a dangerous quest. The third book in the Heroes of Olympus series will unite them with Jason, Piper, and Leo. But they number only six--who will complete the Prophecy of Seven?

The Greek and Roman demigods will have to cooperate in order to defeat the giants released by the Earth Mother, Gaea. Then they will have to sail together to the ancient land to find the Doors of Death. What exactly are the Doors of Death? Much of the prophecy remains a mystery. . . .
With old friends and new friends joining forces, a marvelous ship, fearsome foes, and an exotic setting, The Mark of Athena is be another unforgettable adventure by master storyteller Rick Riordan.

作者簡介：

Biography

Rick Riordan is the #1 New York Times bestselling author of the Percy Jackson and the Olympians series, the Kane Chronicles, and the Heroes of Olympus. He is also the author of the multi-award-winning Tres Navarre mystery series for adults.

For fifteen years, Rick taught English and history at public and private middle schools in the San Francisco Bay Area and in Texas. In 2002, Saint Mary's Hall honored him with the school's first Master Teacher Award.

While teaching full time, Riordan began writing mystery novels for grownups. His Tres Navarre series went on to win the top three national awards in the mystery genre - the Edgar, the Anthony and the Shamus. Riordan turned to children's fiction when he started The Lightning Thief as a bedtime story for his oldest son.

Today over 30 million copies of his Percy Jackson, Kane Chronicles, and Heroes of Olympus books are in print in the United States, and rights have been sold into more than 35 countries. Rick is also the author of The 39 Clues: The Maze of Bones, another #1 New York Times bestseller. In 2011, Rick received the Children's Choice Book Award for Author of the Year.

Rick Riordan now writes full-time. He lives in San Antonio with his wife and two sons.

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