The House of Hades is by Rick Riordan. The fourth book in the Heroes of Olympus series. Percy and Annabeth must find their way through Tartarus to the Doors of Death. Jason and the rest of the gang must find their way to Greece to the House of Hades to rescue Percy and Annabeth and close the Doors of Death to keep monsters from having a passage to the mortal world. Fans of this series will not be disappointed.
Ratings: 7th grade - 8 out of 10 - V (some violence).