The Lost Hero

The Lost Hero is the first book in the second Camp Half-Blood series, called The Heroes of Olympus still written by Rick Riordan. Unlike the other books, it appears to be written in third person.

Synopsis
AS OLD ENEMIES AWAKEN, CAMP HALF-BLOOD'S NEW ARRIVALS MUST PREPARE FOR WAR....

  But rumors of a terrible curse – and a missing hero – are flying around camp.

It seems Jason, Piper, and Leo are the chosen ones to embark on a terrifying new quest, which they must complete by the winter solstice, in just four days time. The story begins on October 12th, 2010.

Can the trio succeed on this deadly mission – and what must they sacrifice in order to survive?

Jason has a problem. He doesn't remember anything before waking up on a school bus holding hands with a girl. Apparently she's his girlfriend, Piper, his best friend is a kid named Leo Valdez, and they’re all students in the Wilderness School, a boarding school for “bad kids.” What he did to end up here, Jason has no idea—except that everything seems very wrong.

Piper has a secret. Her father has been missing for three days, and her vivid nightmares reveal that he's in terrible danger. Now her boyfriend doesn't recognize her, and when a freak storm and strange creatures attack during a school field trip, she, Jason, and Leo are whisked away to someplace called Camp Half-Blood. What is going on?

Leo has a way with tools. His new cabin at Camp Half-Blood is filled with them. Seriously, the place beats Wilderness School hands down, with its weapons training, monsters, and fine-looking girls. What’s troubling is the curse everyone keeps talking about, and that a camper's gone missing. Weirdest of all, his bunk-mates insist they are all—including Leo—related to a god.

The Great Prophecy
"Seven half bloods shall answer the call,

To storm or fire the world must fall,

An oath to keep with a final breath,

And foes bear arms to the Doors of Death".

Sample Chapter list
Chapter 1: Jason

Chapter 2: Jason 

i loveeeee pooooppppyyyyyyCharacters

 * Jason: A 15 or 16 year-old demigod who's lost his memory. Coupled with amnesia, the only one who can see through the mist said he's never seen him in his life. He has a golden coin that turns into a golden sword when flipped and vice versa. He can manipulate the Mist, and survived lightning that would kill twenty men, though his shoe is blasted to bits (The original Jason lost a sandal, and found the Fleece). He can also manipulate air. Jason saw a friend being bullied and took an instant dislike to the bullies, though he couldn't remember them. Jason jumped off the Grand Canyon to save Piper, showing his courage and loyalty to his friends. He and Percy both share this fatal flaw (personal loyalty).
 * Leo Valdez: He's Jason's demigod best friend. He's very mischievous. He also likes to build things and is constantly busy with tools. And he's fooled by Jason's mist.
 * Piper: She's Jason's demigod girlfriend. Her dad is apparently very important, but it's her mother who's immortal. She too is fooled by Jason's mist.
 * Gleeson Hedge: He's a satyr posing as a coach who was assigned to protect Leo and Piper. Once Jason is attacked, however, Gleeson decides to protect him. Previously, he tried to defend a park in Toronto from a giant evil badger. The only one who wasn't fooled by Jason's mist.
 * Dylan: He is a cruel boy with blinding white teeth. He transmogrifies into an anemoi thuelli, a Ventus (storm demon son of Typhon or a storm spirit) and tries to kill the demigods. He summons two other storm demons, but Jason slays them. Dylan kidnaps Gleeson Hedge. The monster says that his "mistress" will destroy all demigods, but it's unknown who his mistress is.
 * Butch: He arrives with Annabeth on a chariot pulled by a pair of pegasi. There is a rainbow tattoo on his arm.
 * Annabeth Chase: Daughter of Athena. Annabeth arrives in a flying chariot with a demigod named Butch, on account of the dream she received telling her to go there and find someone with one shoe in order to find her boyfriend, Percy Jackson, who has been missing for three days.
 * Percy Jackson: Son of Poseidon. He has been lost for three days and it is very likely that he is the lost hero. Main protagonist and narrator of the previous series. Learn more about Percy in the Percy Jackson and the Olympians series.
 * Hera: On the official Heroes of Olympus website, Hera is found in the characters section alongside the three main protagonists, the only Olympian god to be featured there. This possibly indicates that she will be important to the events of the book, though how is uncertain. She possesses a marked hatred of demigods, and could therefore be Dylan's mysterious "mistress." However it is also notable that she was a loyal ally of the mythological Jason, and could therefore share a similar connection to the new hero who bears his name. She has been mentioned to be in "a jam" at the moment, and needing Demigod help.