The Heroes of Olympus: The Complete Series

by Rick Riordan

  ‘No,’ she insisted. ‘No, this is Gaia’s fault. It had nothing to do with you.’

  Leo wanted to believe that, but he couldn’t. They’d started this voyage with Leo messing up, firing on New Rome. They’d ended in old Rome with Leo breaking a cookie and paying a price much worse than an eye.

  ‘Leo, listen to me.’ Hazel gripped his hand. ‘I won’t allow you to take the blame. I couldn’t bear that after – after Sammy …’

  She choked up, but Leo knew what she meant. His bisabuelo had blamed himself for Hazel’s disappearance. Sammy had lived a good life, but he’d gone to his grave believing that he’d spent a cursed diamond and doomed the girl he loved.

  Leo didn’t want to make Hazel miserable all over again, but this was different. True success requires sacrifice. Leo had chosen to break that cookie. Percy and Annabeth had fallen into Tartarus. That couldn’t be a coincidence.

  Nico di Angelo shuffled over, leaning on his black sword. ‘Leo, they’re not dead. If they were, I could feel it.’

  ‘How can you be sure?’ Leo asked. ‘If that pit really led to … you know … how could you sense them so far away?’

  Nico and Hazel shared a look, maybe comparing notes on their Hades/Pluto death radar. Leo shivered. Hazel had never seemed like a child of the Underworld to him, but Nico di Angelo – that guy was creepy.

  ‘We can’t be one hundred percent sure,’ Hazel admitted. ‘But I think Nico is right. Percy and Annabeth are still alive … at least, so far.’

  Jason pounded his fist against the rail. ‘I should’ve been paying attention. I could have flown down and saved them.’

  ‘Me, too,’ Frank moaned. The big dude looked on the verge of tears.

  Piper put her hand on Jason’s back. ‘It’s not your fault, either of you. You were trying to save the statue.’

  ‘She’s right,’ Nico said. ‘Even if the pit hadn’t been buried, you couldn’t have flown into it without being pulled down. I’m the only one who has actually been into Tartarus. It’s impossible to describe how powerful that place is. Once you get close, it sucks you in. I never stood a chance.’

  Frank sniffled. ‘Then Percy and Annabeth don’t stand a chance either?’

  Nico twisted his silver skull ring. ‘Percy is the most powerful demigod I’ve ever met. No offence to you guys, but it’s true. If anybody can survive, he will, especially if he’s got Annabeth at his side. They’re going to find a way through Tartarus.’

  Jason turned. ‘To the Doors of Death, you mean. But you told us it’s guarded by Gaia’s most powerful forces. How could two demigods possibly –?’

  ‘I don’t know,’ Nico admitted. ‘But Percy told me to lead you guys to Epirus, to the mortal side of the doorway. He’s planning on meeting us there. If we can survive the House of Hades, fight our way through Gaia’s forces, then maybe we can work together with Percy and Annabeth and seal the Doors of Death from both sides.’

  ‘And get Percy and Annabeth back safely?’ Leo asked.

  ‘Maybe.’

  Leo didn’t like the way Nico said that, as if he wasn’t sharing all his doubts. Besides, Leo knew something about locks and doors. If the Doors of Death needed to be sealed from both sides, how could they do that unless someone stayed in the Underworld, trapped?

  Nico took a deep breath. ‘I don’t know how they’ll manage it, but Percy and Annabeth will find a way. They’ll journey through Tartarus and find the Doors of Death. When they do, we have to be ready.’

  ‘It won’t be easy,’ Hazel said. ‘Gaia will throw everything she’s got at us to keep us from reaching Epirus.’

  ‘What else is new?’ Jason sighed.

  Piper nodded. ‘We’ve got no choice. We have to seal the Doors of Death before we can stop the giants from raising Gaia. Otherwise her armies will never die. And we’ve got to hurry. The Romans are in New York. Soon, they’ll be marching on Camp Half-Blood.’

  ‘We’ve got one month at best,’ Jason added. ‘Ephialtes said Gaia would awaken in exactly one month.’

  Leo straightened. ‘We can do it.’

  Everyone stared at him.

  ‘The Archimedes sphere can upgrade the ship,’ he said, hoping he was right. ‘I’m going to study those ancient scrolls we got. There’s got to be all kinds of new weapons I can make. We’re going to hit Gaia’s armies with a whole new arsenal of hurt.’

  At the prow of the ship, Festus creaked his jaw and blew fire defiantly.

  Jason managed a smile. He clapped Leo on the shoulder.

  ‘Sounds like a plan, Admiral. You want to set the course?’

  They kidded him, calling him Admiral, but for once Leo accepted the title. This was his ship. He hadn’t come this far to be stopped.

  They would find this House of Hades. They’d take the Doors of Death. And by the gods, if Leo had to design a grabber arm long enough to snatch Percy and Annabeth out of Tartarus, then that’s what he would do.

  Nemesis wanted him to wreak vengeance on Gaia? Leo would be happy to oblige. He was going to make Gaia sorry she had ever messed with Leo Valdez.

  ‘Yeah.’ He took one last look at the cityscape of Rome, turning blood-red in the sunset. ‘Festus, raise the sails. We’ve got some friends to save.’

  Glossary

  AΘE alpha, theta, epsilon. In Greek it stands for of the Athenians, or the children of Athena.

  Achelous a potamus, or river god

  Alcyoneus the eldest of the giants born to Gaia, destined to fight Pluto

  Amazons a nation of all-female warriors

  Aphrodite the Greek goddess of love and beauty. She was married to Hephaestus, but she loved Ares, the god of war. Roman form: Venus

  Arachne a weaver who claimed to have skills superior to Athena’s. This angered the goddess, who destroyed Arachne’s tapestry and loom. Arachne hung herself, and Athena brought her back to life as a spider.

  Archimedes a Greek mathematician, physicist, engineer, inventor and astronomer who lived between 287 and 212 BCE and is regarded as one of the leading scientists in classical antiquity

  Ares the Greek god of war; the son of Zeus and Hera, and half brother to Athena. Roman form: Mars

  argentum silver

  Argo II the fantastical ship built by Leo, which can both sail and fly and has Festus’s bronze dragon head as its figurehead. The ship was named after the Argo, the vessel used by a band of Greek heroes who accompanied Jason on his quest to find the Golden Fleece.

  Athena the Greek goddess of wisdom. Roman form: Minerva

  Athena Parthenos a giant statue of Athena: the most famous Greek statue of all time

  augury a sign of something coming, an omen; the practice of divining the future

  aurum gold

  Bacchus the Roman god of wine and revelry. Greek form: Dionysus

  ballista (ballistae, pl.) a Roman missile siege weapon that launched a large projectile at a distant target (see also scorpion ballista)

  Bellona a Roman goddess of war

  Camp Half-Blood the training ground for Greek demigods, located on Long Island, New York

  Camp Jupiter the training ground for Roman demigods, located between the Oakland Hills and the Berkeley Hills, in California

  Celestial bronze a rare metal deadly to monsters

  centaur a race of creatures that is half human, half horse

  centurion an officer of the Roman army

  Ceres the Roman goddess of agriculture. Greek form: Demeter

  charmspeak a blessing bestowed by Aphrodite on her children that enables them to persuade others with their voice

  chiton a Greek garment; a sleeveless piece of linen or wool secured at the shoulders by brooches and at the waist by a belt

  Chrysaor the brother of Pegasus, the son of Poseidon and Medusa; known as ‘the Gold Sword’

  Circe a Greek sorceress. In ancient times, she turned Odysseus’s crew into swine.

  Colosseum an elliptical amphitheatre in the centre of Rome, Italy. Capable of seating 50,
000 spectators, the Colosseum was used for gladiatorial contests and public spectacles such as mock sea battles, animal hunts, executions, re-enactments of famous battles and dramas.

  cornucopia a large horn-shaped container overflowing with edibles or wealth in some form. The cornucopia was created when Heracles (Roman: Hercules) wrestled with the river god Achelous and wrenched off one of his horns.

  Cyclops a member of a primordial race of giants (Cyclopes, pl.), each with a single eye in the middle of his or her forehead

  Daedalus in Greek mythology, a skilled craftsman who created the Labyrinth on Crete in which the Minotaur (part man, part bull) was kept

  Deianira Heracles’s second wife. She was of such striking beauty that both Heracles and Achelous wanted to marry her and there was a contest to win her hand. The centaur Nessus tricked her into killing Heracles by dipping his tunic in what she thought was a love potion but was actually Nessus’s poisonous blood.

  Demeter the Greek goddess of agriculture, a daughter of the Titans Rhea and Kronos. Roman form: Ceres

  denarius (denarii, pl.) the most common coin in the Roman currency system

  Dionysus the Greek god of wine and revelry, a son of Zeus. Roman form: Bacchus

  Doors of Death doors to a well-hidden passageway that when open allow souls to travel from the Underworld to the world of mortals

  drachma the silver coin of Ancient Greece

  drakon gigantic serpent

  eidolon possessing spirit

  Ephialtes and Otis twin giants, sons of Gaia

  Epirus a region presently in northwestern Greece and southern Albania

  Eurystheus a grandson of Perseus, who, through the favour of Hera, inherited the kingship of Mycenae, which Zeus had intended for Heracles

  faun a Roman forest god, part goat and part man. Greek form: satyr

  Fortuna the Roman goddess of fortune and good luck. Greek form: Tyche

  Forum The Roman Forum was the centre of Ancient Rome, a plaza where Romans conducted business, trials and religious activities.

  Gaia the Greek earth goddess; mother of Titans, giants, Cyclopes and other monsters. Roman form: Terra

  gladius a short sword

  Gorgons three monstrous sisters who have hair of living, venomous snakes. The most famous, Medusa, had eyes that turned the beholder to stone.

  greaves shin armour

  Greek fire an incendiary weapon used in naval battles because it can continue burning in water

  Hades the Greek god of death and riches. Roman form: Pluto

  Hadrian a Roman Emperor who ruled from 117 to 138 CE. He is best known for building Hadrian’s Wall, which marked the northern limit of Roman Britain. In Rome, he rebuilt the Pantheon and constructed the Temple of Venus and Roma.

  Hagno a nymph who is said to have brought up Zeus. On Mount Lycaeus in Arcadia there was a well sacred to and named after her.

  harpy a winged female creature that snatches things

  Hebe the goddess of youth; the daughter of Zeus and Hera, and married to Heracles. Roman form: Juventas

  Hephaestus the Greek god of fire and crafts and of blacksmiths; the son of Zeus and Hera, and married to Aphrodite. Roman form: Vulcan

  Hera the Greek goddess of marriage; Zeus’s wife and sister. Roman form: Juno

  Heracles the Greek equivalent of Hercules; the son of Zeus and Alcmene; the strongest of all mortals

  Hercules the Roman equivalent of Heracles; the son of Jupiter and Alcmene, who was born with great strength

  hippocampi creatures that from the waist up have the body of a horse and from the waist down have silvery fish bodies, with glistening scales and rainbow tail fins. They were used to draw Poseidon’s chariot, and sea foam was created by their movement.

  hippodrome a Greek stadium for horse racing and chariot racing

  House of Hades an underground temple in Epirus, Greece, dedicated to Hades and Persephone, sometimes called a necromanteion, or ‘oracle of death’. Ancient Greeks believed it marked one entrance to the Underworld, and pilgrims would go there to commune with the dead.

  hypogeum the area under a coliseum that housed set pieces and machinery used for special effects

  ichthyocentaur a fish-centaur described as having the forefeet of a horse, a human torso and head, and a fish tail. It is sometimes shown with a pair of lobster-claw horns.

  Imperial gold a rare metal deadly to monsters, consecrated at the Pantheon; its existence was a closely guarded secret of the emperors

  Invidia the Roman goddess of revenge. Greek form: Nemesis

  Iris the Greek rainbow goddess and a messenger of the gods; the daughter of Thaumas and Electra. Roman form: Iris

  Juno the Roman goddess of women, marriage and fertility; sister and wife of Jupiter; mother of Mars. Greek form: Hera

  Jupiter the Roman king of the gods; also called Jupiter Optimus Maximus (the best and the greatest). Greek form: Zeus

  Juventas the Roman goddess of youth. Greek form: Hebe

  Kalends of July the first day of July, which was sacred to Juno

  karpoi grain spirits

  Katoptris Piper’s dagger, once owned by Helen of Troy. The word means ‘looking glass’.

  Keto the Greek goddess of sea monsters and large sea creatures, such as whales and sharks. She is the daughter of Gaia and the sister-wife of Phorcys, god of the dangers of the sea.

  Khione the Greek goddess of snow; daughter of Boreas

  Kronos the Greek god of agriculture, the son of Uranus and Gaia and the father of Zeus. Roman form: Saturn

  Lar a house god, ancestral spirit of Rome (Lares, pl.)

  Lupa the sacred Roman she-wolf that nursed the foundling twins Romulus and Remus

  Marcus Agrippa a Roman statesman and general, defence minister to Octavian and responsible for most of his military victories. He commissioned the Pantheon as a temple to all the gods of Ancient Rome.

  Mare Nostrum Latin for Our Sea; a Roman name for the Mediterranean Sea

  Mars the Roman god of war; also called Mars Ultor. Patron of the empire; divine father of Romulus and Remus. Greek form: Ares

  Minerva the Roman goddess of wisdom. Greek form: Athena

  Minotaur a monster with the head of a bull on the body of a man

  Mist a magic force that disguises things from mortals

  Mithras Originally a Persian god of the sun, Mithras was worshipped by Roman warriors as a guardian of arms and a patron of soldiers.

  muskeg bog

  Narcissus a Greek hunter who was renowned for his beauty. He was exceptionally proud and disdained those who loved him. Nemesis saw this and attracted Narcissus to a pool where he saw his reflection in the water and fell in love with it. Unable to leave the beauty of his reflection, Narcissus died.

  Nemesis the Greek goddess of revenge. Roman form: Invidia

  Neptune the Roman god of the sea. Greek form: Poseidon

  Nereids fifty female sea spirits; patrons of sailors and fishermen and caretakers of the sea’s bounty

  Nessus a crafty centaur who tricked Deianira into killing Heracles

  New Rome a community near Camp Jupiter where demigods can live together in peace, without interference from mortals or monsters

  Nike the Greek goddess of strength, speed and victory. Roman form: Victoria

  nymph a female nature deity who animates nature

  nymphaeum a shrine to nymphs

  Pantheon a building in Rome, Italy, commissioned by Marcus Agrippa as a temple to all the gods of Ancient Rome, and rebuilt by Emperor Hadrian in about 126 CE

  pater Latin for father; also the name of an Ancient Roman god of the Underworld, later subsumed by Pluto

  pauldron a piece of plate armour for the shoulder and the upper part of the arm

  Pegasus In Greek mythology, a winged divine horse; sired by Poseidon, in his role as horse-god, and foaled by the Gorgon Medusa; the brother of Chrysaor

  Persephone the Greek queen of the Underworld; wife of Hades; daughter of Zeus and De
meter. Roman form: Proserpine

  Phorcys In Greek mythology, a primordial god of the dangers of the sea; son of Gaia; brother-husband of Keto

  Piazza Navona a city square in Rome, built on the site of the Stadium of Domitian, where Ancient Romans watched competitive games

  Pluto the Roman god of death and riches. Greek form: Hades

  Polybotes the giant son of Gaia, the Earth Mother

  Pomerian Line the boundary around New Rome and, in ancient times, the city limits of Rome

  Porphyrion the king of the Giants in Greek and Roman mythology

  Poseidon the Greek god of the sea; son of the Titans Kronos and Rhea, and brother of Zeus and Hades. Roman form: Neptune

  praetor an elected Roman magistrate and commander of the army

  Proserpine Roman queen of the Underworld. Greek form: Persephone

  Rhea Silvia a priestess and mother of the twins Romulus and Remus, who founded Rome

  Riptide the name of Percy Jackson’s sword (Anaklusmos in Greek)

  Romulus and Remus the twin sons of Mars and the priestess Rhea Silvia. They were thrown into the River Tiber by their human father, Amulius, and rescued and raised by a she-wolf. Upon reaching adulthood, they founded Rome.

  Saturn the Roman god of agriculture; the son of Uranus and Gaia, and the father of Jupiter. Greek form: Kronos

  satyr a Greek forest god, part goat and part man. Roman equivalent: faun

  scorpion ballista a Roman missile siege weapon that launched a large projectile at a distant target

  Senatus Populusque Romanus (SPQR) meaning ‘The Senate and People of Rome’, refers to the government of the Roman Republic and is used as an official emblem of Rome

  skolopendra a gargantuan Greek sea monster with hairy nostrils, a flat crayfish-like tail and rows of webbed feet lining its flanks

  Stymphalian birds in Greek mythology, man-eating birds with bronze beaks and sharp metallic feathers they could launch at their victims; sacred to Ares, the god of war

  Sybilline Books a collection of prophecies in rhyme written in Greek. Tarquinius Superbus, a king of Rome, bought them from a prophetess named Sibyl and consulted them in times of great danger.

  Tartarus husband of Gaia; spirit of the abyss; father of the giants

  telkhines mysterious sea demons and smiths native to the islands of Kaos and Rhodes; children of Thalassa and Pontus; they had flippers instead of hands, and dogs’ heads, and were known as fish children