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The Mark of Athena
by Rick Riordan
Is contained in
Percy Jackson Collection. Percy Jackson and the Lightning Thief, the Last Olympian, the Titans Curse, the Sea of Monsters, the Battle of the Labyrinth, the Demigod Files and the Red Pyramid by Rick Riordan (indirect)
References to this work on external resources.
Wikipedia in English (1)
"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--Greece itself--to find the Doors of Death"--
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Melvil Decimal System (DDC)813.6 — Literature English (North America) American fiction 21st Century
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An edition of this book was published by Penguin Australia.