Heroes of Olympus - The Mark of Athena

A destiny written in prophecy calls seven demigods on a perilous journey to locate and seal the doors of death itself. As Annabeth confronts an unsettling presence that shadows her steps, the crew of the Argo II races against time and mounting darkness. With danger at every turn, these heroes must survive their most harrowing quest yet or risk catastrophe on an unimaginable scale.