Heroes Of Olympus: The House Of Hades

A thousand deadly monsters. Three battling demigods. One fatal decision.

Hazel looked behind Hecate at the middle gateway. She saw Percy and Annabeth sprawled helplessly before those black-and-silver doors. A massive dark shape, vaguely humanoid, now loomed over them, its foot raised as if to crush Percy.

'What about them?' hazel asked, her voice ragged. 'Percy and Annabeth?'

Author: Rick Riordan 

Publisher: Puffin Books

Released Date: 2014

ISBN: 9780141339207