The House of Hades
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50 free The House of Hades trivia questions with answers — literature quiz, new questions added Oct 2026.
The House of Hades is the fourth Heroes of Olympus novel, and one reviewer called it the darkest book in the series. Rick Riordan splits his heroes in two: Percy and Annabeth cross Tartarus on foot with unlikely allies, while their friends sail the Argo II through Italy and Croatia towards Greece, racing to reach the far side of the Doors of Death. This quiz follows the plot the way a reading check would. It covers the allies and enemies waiting in the pit, the gods and thieves the crew meets on the voyage, the powers each demigod grows into and the sacrifices of the final battle. A few questions look behind the page at how the book was written and received. It suits readers who have just finished the novel, students revising for a reading quiz and Percy Jackson fans testing their recall. The opening questions are friendly, later ones reach for smaller details, and every answer comes with a short explanation.
30 of 50 questions with answers and explanations. Play the quiz
Q 01Which immortal, who once nursed Percy back to health, does Leo fall in love with in The House of Hades?
Calypso
Calypso was meant to be released at Percy's request once the Titan war ended, yet she is still stranded when Leo arrives.
Q 02Which monster, who dragged Annabeth and Percy into Tartarus, does Percy destroy with his sword in The House of Hades?
Arachne
Arachne ambushes the pair in the pit; in the previous book Annabeth had tricked her into weaving the very trap that bound her.
Q 03What kind of skeletal pet, named Small Bob, does Bob the Titan adopt in Tartarus in The House of Hades?
A kitten
A kitten most of the time, Small Bob can swell into a full-grown saber-toothed cat whenever he wishes.
Q 04Which deity withholds a scepter until Nico admits he once had a crush on Percy in The House of Hades?
Cupid
Cupid stays invisible, even as Nico sets skeleton warriors on him, and appears only after the confession; a Guardian reviewer called the book's handling of it subtle and effective.
Q 05Which bronze dragon, figurehead of the Argo II, does Piper wake by voice to beat a goddess in The House of Hades?
Festus
Festus was reduced to a head after a crash landing in an earlier book, yet once roused his fire burns the goddess's two brothers.
Q 06Which god's blessing leaves Frank taller and more muscular after a battle with monsters in The House of Hades?
Mars
Mars is Frank's father, and the blessing also silences the god's Greek and Roman voices that had been arguing inside Frank's head.
Q 07Which river of the Underworld had wiped the memory of Bob the Titan before the events of The House of Hades?
The Lethe
The Lethe is the river of forgetfulness; Percy had thrown the hostile Titan into it during a fight, leaving him gentle and childlike.
Q 08Which daughter of Bellona flies from New York to Greece on a pegasus to find the crew in The House of Hades?
Reyna
Reyna answers a message from Annabeth, who believes only a Roman returning a long-lost statue to the Greeks can stop the camps going to war.
Q 09Which power to alter what others see as real does Hazel master after meeting a goddess in The House of Hades?
The Mist
The Mist becomes Hazel's weapon in the final fight, where she conjures a maze of illusion and drops a sorceress through a trapdoor.
Q 10Which ancient goddess do Percy and Annabeth fool by posing as tourists with a brochure in The House of Hades?
Nyx
Nyx is so stung at being left out of their guide that she summons her children, whose darkness is so deep even she cannot see through it.
Q 11Which Titan, renamed Bob after losing his memory, guides Percy and Annabeth across Tartarus in The House of Hades?
Iapetus
Iapetus turns up when he overhears the pair reminiscing about him, though the pit slowly restores the memories Percy once wiped.
Q 12What job had the lord of the dead given Bob the Titan before he rejoins Percy in The House of Hades?
A janitor
A janitor in the Underworld is the humble post the amnesiac Titan held, far from his old rank as Lord of the West.
Q 13Which goddess shows Hazel a northern route past hostile mountains if she learns to bend reality in The House of Hades?
Hecate
Hecate also reveals that she once led Hazel's mother to the spell that summoned Pluto, and she later fights beside the crew.
Q 21Into what does a farming god in Venice turn Nico, out of hatred for the boy's father, in The House of Hades?
A corn plant
A corn plant is what Nico stays until Frank wins the god a new serpent for his chariot, after which the god also heals a poisoned Hazel.
Q 22What kind of monster is Kelli, who once posed as a cheerleader and is crushed by Bob in The House of Hades?
An empousa
An empousa slain by Annabeth in an earlier book, Kelli leads a pack toward the Doors of Death hoping to get even with Percy.
Q 23Whose sphere, a prized invention that Leo carries, is stolen when thieves raid the Argo II in The House of Hades?
Archimedes
Archimedes's sphere matters so much to Leo that he chases the thieves to their hideout and beats them with a homemade flash-bang grenade.
Q 14Which daughter of the north wind attacks the Argo II and hurls Leo far away in The House of Hades?
Khione
Khione is the snow goddess who betrayed Jason, Piper and Leo in an earlier book, and this time she brings her two brothers along.
Q 15Which satyr chaperone of the Argo II volunteers to escort a giant statue home at the end of The House of Hades?
Coach Hedge
Coach Hedge has his own reason to hurry back: his wife Mellie, a cloud nymph, is expecting their baby.
Q 16Which statue does Annabeth ask a Roman to carry to Camp Half-Blood as a peace offering in The House of Hades?
The Athena Parthenos
The Athena Parthenos rides in the hold of the Argo II until Nico offers to help take it home, in the hope of preventing a war between the camps.
Q 17Which augur, left in command of the Roman legion, defies orders not to attack Camp Half-Blood in The House of Hades?
Octavian
Octavian, a descendant of Apollo, takes charge when his fellow leader leaves on a quest, and his warmongering only grows.
Q 18Which Roman rank does Jason hand to Frank mid-battle so Frank can lead a ghost army in The House of Hades?
Praetor
Praetor was Jason's own office at Camp Jupiter, but having chosen the Greek side he could no longer control the scepter that raised the dead.
Q 19Which affliction strikes Annabeth in Tartarus as a curse from the Cyclops Polyphemus in The House of Hades?
Blindness
Blindness is the Cyclops's revenge for the time Annabeth used her invisibility to fool him, and Bob the Titan is able to cure it.
Q 20On which mythical island does Leo land after an attacker banishes him from the Argo II in The House of Hades?
Ogygia
Ogygia is the prison of a Titan's daughter who backed the losing side in an ancient war, and Leo swears on the River Styx to come back for her.
Q 24Which Oracle of Delphi hands the Roman legion's leader a plea for help from Annabeth in The House of Hades?
Rachel Dare
Rachel Dare delivers it in New York with Grover Underwood at her side; the message says only one Roman can carry a certain statue home.
Q 25Which Roman emperor's scepter, able to raise dead legionnaires, do Jason and Nico retrieve in The House of Hades?
Diocletian
Diocletian's palace at Split on the Croatian coast is only where the search starts: the scepter has been carried off by a god, and the demigods leave a note at the palace for a Roman ally.
Q 26Which cow-like monsters does Frank slaughter across Venice, earning a god's blessing, in The House of Hades?
Katobleps
Katobleps fall to Frank one after another until the last is turned into a serpent, the payment a farming god wanted for his chariot.
Q 27In which Italian city do monkey-like thieves raid the Argo II and steal Leo's sphere in The House of Hades?
Bologna
Bologna is where the thieves trap Jason in a net beside the Fountain of Neptune before Leo tracks them to their hideout.
Q 28To which island do borrowed storm spirits tow the damaged Argo II in The House of Hades?
Malta
Malta is reached only after the damaged ship has sat docked for several days at the palace of a wind god, who lends the spirits.
Q 29Which peaceful giant, exiled to Tartarus for refusing to fight the gods, aids Percy in The House of Hades?
Damasen
Damasen was created to oppose the god of war yet turned out gentle, and in the end he charges into battle against the pit itself.
Q 30Which city's queen became Hecuba, the hellhound at the side of the goddess of magic in The House of Hades?
Troy
Troy's queen was transformed when the Trojan War ended, and the goddess now keeps her close as one of two animal companions.