This book consists of articles from Wikia or other free sources online.

Chapters: Characters, Dogs, Items, Magic, Merchandise, People, Percy Jackson and the Olympians books, Percy Jackson and the Olympians characters, Percy Jackson and the Olympians events, Percy Jackson and the Olympians films, Percy Jackson and the Olympians places, Places, Prophecies, Setting, Wallpapers, Argentium, Aurum, Cerberus, Gladiola, Hellhound, Mrs. O'Leary, Orthus, Aegis, Ambrosia, Annabeth's Knife, Annabeth's Yankees Cap, Aphrodite's Scarf, Aphrodite's Throne, Apollo's Throne, Ares' Backpack, Ares' Cabin, Ares' Shield, Ares' Sword, Ares' Throne, Ares' War Chariot, Argo II, Ariadne's String, Armor, Artemis' Chariot, Artemis' Knives, Athena's Throne, Backbiter, Blessed Metals, Bow and Arrow, Burial Shroud, Caduceus, Calypso's Raft, Camp Necklace, Celestial Bronze, Cell Phone, Centaur Blood, Chameleon Armor, Chariot, Chiron's Wheelchair, Circe's Potion, Clarisse's Spear, Daedalus' Laptop, Daedalus' Wings, Demeter's Throne, Dionysus' Throne, Elder Python Venom, Electric Spear, Fart Arrows, Flag, Flaming Dodgeball, Flying Chariot, Frank's Spear, Gladius, Golden Apple, Golden Bow, Golden Drachma, Gorgon Blood, Gray Sisters' Eye, Gray Sisters' Taxi, Gray Sisters' Tooth, Greek Fire, Green LotusCash Cards, Hades' Robes, Hazel's Sword, Helm of Darkness, Hephaestus' Throne, Hephaestus TV, Hera's Throne, Hermes' Multivitamins, Hermes' Throne, Hunting Knife, Imperial Gold, Ivlivs, Kampe's Scimitars, Katoptris, Keys of Hades, Knife, Kronos' Sarcophagus, Kronos' Scythe, Leo's Magical Toolbelt, Leroy's Sword, Lotus Flower, Magic Items, Maimer, Master Bolt, Medea's Sunscreen, Medusa's Head, Minotaur's Axe, Moonlace, Mossberg 500, Mythomagic, Nectar, Nemean Lion's Pelt, Nico's Sword, Pandora's Pithos, Permanent Makeup, Persephone's Flowers, Poseidon's Fountain, Poseidon's Pearls, Poseidon's Throne, Poseidon's Trident, Queen Anne's Revenge, Reed Pipes, Riptide, Sand Dollar, Satyr's...