50 Fun Facts About The Heroes of Olympus

What name does Leo Valdez give the flying warship he builds to carry the Heroes of Olympus to Greece?

Argo II is a flying trireme that Leo designed partly from a picture he drew in kindergarten. A bronze dragon's head serves as its figurehead.

Which goddess steals the memories of Percy Jackson and Jason Grace and swaps them between two rival demigod camps?

Hera, acting in her Roman form as Juno, made the swap to force Greek and Roman demigods to unite. She had earlier posed as Leo's babysitter, Tía Callida.

Reyna's older sister Hylla rules as queen of which all-female group in The Heroes of Olympus?

The Amazons secretly run the billion-dollar Amazon.com as both a cover story and a money-maker, with Hylla on the throne.

In The Lost Hero, the last demigod before Leo Valdez able to summon flames is blamed for which disaster?

The Great Fire of London is pinned in the book on Thomas Faynor, a demigod who could not control his flames. Campers call the gift a curse.

Piper McLean's dagger Katoptris, which shows her visions of the future, once belonged to which legendary beauty?

Helen of Troy once owned Katoptris, whose name is ancient Greek for mirror. The blade stops showing visions after the last battle against the giants.

Camp Jupiter's legion keeps a war elephant named after which ancient general who fought Rome?

Hannibal is the war elephant owned by Camp Jupiter, a cheeky choice for Romans: the real Hannibal of Carthage was one of Rome's most feared enemies.

Which son of Hades, half-brother of Hazel Levesque, was the only demigod who knew about both camps before the war?

Nico di Angelo was born in Italy before the Second World War and looks only fourteen because the Lotus Hotel and Casino kept him outside time for decades.

Leo Valdez swears on the River Styx to return to the island of Ogygia and free which captive he loves?

Calypso, a daughter of the Titan Atlas, had been confined to Ogygia since the First Titan War. Leo keeps his oath and frees her at the end of the series.

Stheno and Euryale, who chase an amnesiac Percy Jackson all the way to Camp Jupiter, are sisters of which monster?

Medusa lost her head to Percy in The Lightning Thief. Her sisters are among the monsters brought back to life when the Doors of Death opened.

Which hero, posted by Zeus at the entrance to the Mediterranean, demands a quest from Jason Grace and Piper McLean?

Hercules guards the pillars that bear his name and sends the pair to steal the river god Achelous's remaining horn, which Piper keeps for herself.

Leo Valdez's rare gift for conjuring fire out of nothing comes from which immortal father?

Hephaestus rarely passes on the fire gift, and Leo hides it at first out of guilt over his mother's death seven years earlier.

Piper McLean, who cuts her own hair and cares little for fashion, is claimed by which goddess in The Lost Hero?

Aphrodite's children are usually obsessed with beauty and fashion, which Piper is not. Her inherited powers include speaking French, the language of love.

Jason Grace wakes with no memory on a Wilderness School bus heading for a field trip to which landmark?

The Grand Canyon is where a classmate turns into a storm spirit and attacks, moments before a flying chariot arrives from Camp Half-Blood.

Which lieutenant of the Hunters of Artemis turns out to be the long-lost older sister of Jason Grace?

Thalia is a daughter of Zeus, the Greek form of Jason's Roman father, so the siblings belong to different camps. She had been told he was dead.

Which goddess, who raised Romulus and Remus, trains young Roman demigods before sending them to Camp Jupiter?

Lupa is the Roman answer to Camp Half-Blood's trainer Chiron, only more militaristic. She and her pack raised Jason Grace.

Tristan McLean, the father Piper McLean rescues from a giant in The Lost Hero, is famous among mortals as what?

A film actor of Cherokee heritage, Tristan McLean is held captive by the giant Enceladus. A potion from Piper's mother later wipes the ordeal from his mind.

Leo Valdez tames a runaway bronze dragon in the woods of Camp Half-Blood and gives it which name?

Festus, Latin for happy, later loses his body in a crash landing, but his head survives as the figurehead and control system of the demigods' ship.

Leo Valdez finds the blueprint for a flying ship in which abandoned hideout in the woods of Camp Half-Blood?

Bunker 9 had been abandoned in the camp's woods. After Leo finds it, the head counselor of his cabin steps down and hands him the job.

Camp Jupiter, the hidden Roman counterpart of Camp Half-Blood, lies close to which American city?

San Francisco is where Jason, Piper and Leo end up late in The Lost Hero, just before Jason remembers the Roman camp he came from.

Which king of the giants, created to oppose the ruler of the gods, awakens at the climax of The Lost Hero?

Porphyrion stands forty feet tall, and like every giant in the series he can only be killed by a god and a demigod fighting side by side.

Which Heroes of Olympus novel follows an amnesiac Percy Jackson as he befriends Hazel Levesque and Frank Zhang?

The Son of Neptune is how a goddess introduces Percy to the Roman legion when he arrives, using his father's Roman name rather than the Greek Poseidon.

Percy Jackson, Hazel Levesque and Frank Zhang travel to which American state to free the captive god of death?

Alaska is where the giant Alcyoneus holds Thanatos in chains. While death is bound, Gaea's fallen allies keep returning to life.

Percy Jackson starts recovering his lost memories after a deadly wager with the blind seer Phineas by drinking what?

Gorgon's blood begins restoring Percy's memory, while Phineas, steered by Gaea, picks the poisoned vial and dies after revealing where a giant is camped.

Jason Grace got the small scar on his upper lip as a two-year-old by trying to eat which office item?

A stapler gave Jason the scar above his lip when he was two. His sister last saw him at that age, and their mother told her he had died.

The Fates tied Frank Zhang's life to which fragile object, meaning he dies if it ever burns away?

A piece of firewood holds Frank's life force, echoing the Greek legend of Meleager. He eventually entrusts it to Hazel for safekeeping.

Frank Zhang inherits which family gift from his distant ancestor Periclymenus, a grandson of the sea god Poseidon?

Shapeshifting runs in his mother's family, who descend from the sea god. Frank only masters it late in his first quest.

Hazel Levesque grew up in the 1940s in which American city, where her mother kept a gris-gris shop?

New Orleans was Hazel's home until her mother moved them far away, where Hazel died stopping a giant's rise. Decades later her half-brother led her back from the Underworld.

Which foul-mouthed horse, a half-brother of Percy Jackson, does Hazel Levesque win over with precious metals?

Arion is a son of the sea god and the grain goddess Ceres, and he is known to curse whenever his abilities are doubted.

Ella, who memorises books of prophecy and falls for Percy Jackson's Cyclops brother Tyson, is what kind of creature?

A harpy with red feathers, Ella has a photographic memory, so the prophecies stored in her head make her valuable to both sides.

Which order-obsessed Roman god, whose statues line New Rome's city limits, helps Percy Jackson kill a giant?

Terminus is the god of boundaries, and he joins the fight when Camp Jupiter is attacked because a giant only dies when a god and a demigod strike together.

Annabeth Chase follows a trail meant only for her mother's children through Rome to recover which stolen statue?

The Athena Parthenos was taken from the Greeks by the Romans in ancient times. Returning it ends the feud between the camps and heals the gods' split personalities.

Annabeth Chase beats which monster, cursed by Athena after a weaving contest, by tricking her into weaving a trap?

Arachne is tricked into weaving giant Chinese handcuffs that bind her. In her rage she brings down the chamber and opens a chasm beneath it.

At the end of The Mark of Athena, Percy Jackson and Annabeth Chase are dragged down into which dreaded abyss?

Tartarus is where slain monsters regenerate, and the pair must cross it to reach the Doors of Death, the only way back to the mortal world.

In The Mark of Athena, the goddess Nemesis hands Leo Valdez which everyday item that grants help at a terrible price?

A fortune cookie from Nemesis frees Leo, Hazel and Frank from a trap under Rome, and Leo blames it for the disaster that befalls his friends soon after.

The Titan Iapetus, who guides Percy Jackson and Annabeth Chase toward the Doors of Death, goes by which everyday name?

Bob got his name from Percy, who wiped the Titan's memory in the River Lethe and told him they were friends. Hades then made him an Underworld janitor.

Which Roman god, known at Camp Half-Blood in Greek form as the grumpy director Mr. D, helps kill twin giants in Rome?

Bacchus is the Roman form of Dionysus, the god the twins Ephialtes and Otis were made to oppose. The pair had been holding a captured demigod in Rome.

Leo Valdez chases the thieving Kerkopes through Bologna to win back a prized sphere built by which ancient inventor?

Archimedes's sphere is Leo's prize, and during the same chase he pockets an astrolabe made by Odysseus that later guides him back to a lost island.

Hazel Levesque's 1940s sweetheart Sammy turns out to be which relative of her shipmate Leo Valdez?

Great-grandfather Sammy Valdez looked identical to Leo, and the discovery feeds the tension between Leo, Hazel and her boyfriend Frank.

Annabeth Chase finds a map to the Mark of Athena at which Charleston landmark, where Romans ambush her friends?

Fort Sumter, where the American Civil War began, is where praetor Reyna lets Annabeth go on searching while warning that their next meeting will not be friendly.

Hazel Levesque learns from the goddess Hecate to control which force, tricking a sorceress into an imaginary pit?

The Mist lets Hazel alter what others perceive. At the Doors of Death she recreates the Labyrinth around the sorceress Pasiphaë and drops her into a pit that is not there.

Jason Grace leads the crew to a palace in Split to claim the sceptre of which Roman emperor?

Diocletian's sceptre can summon the ghosts of a dead Roman legion, but only an officer of high enough rank can command them.

Which daughter of the north wind betrays the heroes in The Lost Hero and later blasts Leo Valdez off his own ship?

Khione, the goddess of snow, hurls Leo all the way to a remote island before Piper wakes the ship's dragon figurehead and defeats her.

Gaea's giants gather for their final battle in The Heroes of Olympus at which ancient site instead of Mount Olympus?

The Acropolis in Athens is where the giants finally fall, with the gods fighting beside their children once their Greek and Roman sides are healed.

Which goddess forces Percy Jackson, Leo Valdez, Hazel Levesque and Frank Zhang into her own deadly games at Olympia?

Nike, once captured, warns that one of the crew is destined to die. She later drives Zeus's chariot in the last battle against the giants.

Leo Valdez is brought back to life at the very end of The Heroes of Olympus by which legendary remedy?

The Physician's Cure, brewed by the healing god Asclepius from three rare ingredients, is given to Leo by his bronze dragon after his fiery sacrifice destroys Gaea.

Which giant, a legendary hunter, stalks Reyna as she hauls a huge statue home in the last Heroes of Olympus book?

Orion slaughters many of the Hunters of Artemis sent to protect her before Reyna kills him with help from her mother, the war goddess Bellona.

Octavian, the scheming legacy who turns Camp Jupiter against the Greeks, holds which office in the legion?

Augur means he reads omens for the legion, which lets Octavian claim the gods back his war. He dies by accidentally launching himself from a siege weapon.

Reyna's two magical guard dogs at Camp Jupiter are made of which pair of metals?

Gold and silver are aurum and argentum in Latin, which is why Reyna's dogs are called Aurum and Argentum. She also rides a pegasus named Scipio.

Rick Riordan, author of The Heroes of Olympus, spent fifteen years in which job before writing full-time?

A middle school teacher of English and history in California and Texas, Riordan taught mythology almost every year he spent in the classroom.

At Camp Jupiter, the Roman counterparts of Greek satyrs, mostly beggars rather than protectors, go by which name?

Fauns at Camp Jupiter mostly beg and loaf, unlike Camp Half-Blood's helpful satyrs. One named Don tells Percy it is because they are free spirits.