"Greek and Roman demigods from the Prophecy of Seven must work together to seal the Doors of Death -- and help Percy and Annabeth escape the Underworld in the process"--Provided by publisher.
New paperback edition.
597 pages ; 19 cm.
Heroes of Olympus. Book 4, The house of Hades
Heroes of Olympus. IV, The house of Hades
"Preview of The Blood of Olympus inside"--Cover.
Includes short story: Percy Jackson & the sword of Hades (previously published in The demigod files).
Series:Heroes of Olympus
Heroes of Olympus ; IV
Riordan, Rick. Heroes of Olympus
Riordan, Rick. Heroes of Olympus ; bk. 4.
Subjects:Camps -- Juvenile fiction.
Gaia (Greek deity) -- Juvenile fiction.
Giants -- Juvenile fiction.
Hera (Greek deity) -- Juvenile fiction.
Mythology, Greek -- Juvenile fiction.
Mythology, Roman -- Juvenile fiction.