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The mark of Athena /

By Riordan, Rick.. New York : Disney Hyperion Books, 2012 . 586 p. ; 22 cm.. 9781423174974

By Riordan, Rick. . 376 p. 978-148478252-1

By Riordan, Rick.. New York Hyperion Books 2013 . 597 p. 9781423185406

By Riordan, Rick.. New York : Disney Hyperion Books, 2012 . 586 p. ; 22 cm.. 9781423140603 (hardback)