Chapter List (CHB)

In the Percy Jackson and the Olympians and The Heroes of Olympus series each book is divided into chapters

The Lightning Thief

 * 1) I Accidentally Vaporize My Pre-Algebra Teacher
 * 2) Three Old Ladies Knit the Socks of Death
 * 3) Grover Unexpectedly Loses his Pants
 * 4) My Mother Teaches Me Bullfighting
 * 5) I Play Pinochle with a Horse
 * 6) I Become Supreme Lord of the Bathroom
 * 7) My Dinner Goes Up in Smoke
 * 8) We Capture a Flag
 * 9) I Am Offered a Quest
 * 10) I Ruin a Perfectly Good Bus
 * 11) We Visit the Garden Gnome Emporium
 * 12) We Get Advice from a Poodle
 * 13) I Plunge to My Death
 * 14) I Become a Known Fugitive
 * 15) A God Buys us Cheeseburgers
 * 16) We Take a Zebra to Vegas
 * 17) We Shop for Water Beds
 * 18) Annabeth Does Obedience School
 * 19) We Find Out the Truth, Sort Of
 * 20) I Battle My Jerk Relative
 * 21) I Settle My Tab
 * 22) The Prophecy Comes True
 * 23) (Preview of The Sea of Monsters)

The Sea of Monsters

 * 1) My Best Friend Shops for a Wedding Dress
 * 2) I Play Dodgeball with Cannibals
 * 3) We Hail the Taxi of Eternal Torment
 * 4) Tyson Plays with Fire
 * 5) I Get a New Cabin Mate
 * 6) Demon Pigeons Attack
 * 7) I Accept Gifts from a Stranger
 * 8) We Board the Princess Andromeda
 * 9) I Have the Worst Family Reunion Ever
 * 10) We Hitch a Ride with Dead Confederates
 * 11) Clarisse Blows Up Everything
 * 12) We Check In to C.C.'s Spa & Resort
 * 13) Annabeth Tries to Swim Home
 * 14) We Meet the Sheep of Doom
 * 15) Nobody Gets the Fleece
 * 16) I Go Down with the Ship
 * 17) We Get a Surprise on Miami Beach
 * 18) The Party Ponies Invade
 * 19) The Chariot Race Ends with a Bang
 * 20) The Fleece Works Its Magic Too Well
 * 21) (Preview of the The Titans Curse)

The Titans Curse

 * 1) My Rescue Operation Goes Very Wrong
 * 2) The Vice Principal Gets a Missile Launcher
 * 3) Bianca di Angelo Makes a Choice
 * 4) Thalia Torches New England
 * 5) Place an Underwater Phone Call
 * 6) An Old Dead Friend Comes to Visit
 * 7) Everybody Hates Me but the Horse
 * 8) I Make a Dangerous Promise
 * 9) I Learn How to Grow Zombies
 * 10) I Break a Few Rocket Ships
 * 11) Grover Gets a Lamborghini
 * 12) I Go Snowboarding with a Pig
 * 13) We Visit the Junkyard of the Gods
 * 14) I Have a Dam Problem
 * 15) I Wrestle Santa's Evil Twin
 * 16) We Meet the Dragon of Eternal Bad Breath
 * 17) I Put on a Few Million Extra Pounds
 * 18) A Friend Says Good-bye
 * 19) The Gods Vote How to Kill Us
 * 20) I Get a New Enemy for Christmas
 * 21) (Preview of The Battle of the Labyrinth)

The Battle of the Labyrinth

 * 1) I Battle the Cheerleading Squad
 * 2) The Underworld Sends Me a Prank Call
 * 3) We Play Tag with Scorpions
 * 4) Annabeth Breaks the Rules
 * 5) Nico Buys Happy Meals for the Dead
 * 6) We Meet the God with Two Faces
 * 7) Tyson Leads a Jailbreak
 * 8) We Visit the Demon Dude Ranch
 * 9) I Scoop Poop
 * 10) We Play the Game Show of Death
 * 11) I Set Myself on Fire
 * 12) I Take a Permanent Vacation
 * 13) We Hire a New Guide
 * 14) Moooo! goes the cow
 * 15) We Steal Some Slightly Used Wings
 * 16) I Open a Coffin
 * 17) The Lost God Speaks
 * 18) Grover Causes a Stampede
 * 19) The Council Gets Cloven
 * 20) My Birthday Party Takes a Dark Turn
 * 21) (Preview of The Last Olympian)

The Last Olympian

 * 1) I Go Cruising with Explosives
 * 2) I Meet Some Fishy Relatives
 * 3) I Get a Sneak Peek at My Death
 * 4) We Burn a Metal Shroud
 * 5) I Drive My Dog Into a Tree
 * 6) My Cookies Get Scorched
 * 7) My Math Teacher Gives Me a Lift
 * 8) I Take the Worst Bath Ever
 * 9) Two Snakes Save My Life
 * 10) I Buy Some New Friends
 * 11) We Break a Bridge
 * 12) Rachel Makes a Bad Deal
 * 13) A Titan Brings Me a Present
 * 14) Pigs Fly
 * 15) Chiron Throws a Party
 * 16) We Get Help from a Thief
 * 17) I Sit on the Hot Seat
 * 18) My Parents Go Commando
 * 19) We Trash the Eternal City
 * 20) We Win Fabulous Prizes
 * 21) Blackjack Gets Jacked
 * 22) I Am Dumped
 * 23) We Say Good-bye, Sort Of

The Lost Hero
There are no chapter titles. Each chapter has a name of one of the main characters and is written in Roman Numerals. There are 56 chapters going alternately in the order of Jason, Piper, Leo. Each characters gets two chapters before it shifts to another character in the order: first Jason, then Piper and lastly Leo; after that it goes back to Jason and the cycle repeats itself.