| Spoiler Alert!
Warning! This page contains spoilers for The Blood of Olympus.
|The Blood of Olympus|
|Cover Artist||John Rocco|
|Release Date||October 7th, 2014|
|Preceded by||The House of Hades|
The first chapter of The Blood of Olympus will be released along with the e-single of The Staff of Serapis on May 20th, 2014.  Nico di Angelo will have a POV.  On May 17th, 2014, The Blood of Olympus sneak preview leaked early three days earlier than scheduled.  In the chapter preview, Jason Grace is shown to have a POV. On June 30, 2014, Rick Riordan stated on twitter that Reyna Avila Ramírez-Arellano would have a POV.  On August 19th, 2014 the official chapter preview was released through Disney Hyperion. Disney Hyperion sent "Swag" boxes full of Heroes of Olympus goodies to famous youtubers and included a clue about the Seven, plus Nico and Reyna, on whether they will survive the final battle.
Though the Greek and Roman crew-members of the Argo II have made progress in their many quests, they still seem no closer to defeating the earth mother, Gaea. Her giants have risen—all of them, and they're stronger than ever. They must be stopped before the Feast of Spes, when Gaea plans to have two demigods sacrificed in Athens. She needs their blood—the blood of Olympus—in order to wake. The demigods are having more frequent visions of a terrible battle at Camp Half-Blood. The Roman legion from Camp Jupiter, led by Octavian, is almost within striking distance. Though it is tempting to take the Athena Parthenos to Athens to use as a secret weapon, the friends know that the huge statue belongs back on Long Island, where it might be able to stop a war between the two camps. The Athena Parthenos will go west; the Argo II will go east. The gods, still suffering from multiple personality disorder, are useless. How can a handful of young demigods hope to persevere against Gaea's army of powerful giants? As dangerous as it is to head to Athens, they have no other option. They have sacrificed too much already. And if Gaea wakes, it is game over. 
Jason Grace, Piper McLean, and Annabeth Chase infiltrate Odysseus' Palace in Ithaca using Hazel Levesque's magic, where a gathering of evil spirits or suitors is occurring. Jason, disguised as an old beggar man named Iros, is called out by Antinous who questions why Iros is there. Jason covers himself by stating that he is still running messages for the suitors and attempts to get more information out of Antinous. Eurymachus, a ghost, accidentally gives away information about how Gaea is stopping the demigods from getting to Acropolis. Eurymachus is stopped short by Antinous and is destroyed. Antinous tells Jason that Apollo no longer has control of Delphi and that Victory is running rampant, so there is no way the demigods will win. Michael Varus, the previous Praetor of Camp Jupiter who lost the Twelfth Legion's eagle in Alaska goes up to Jason and tells him that he cannot leave since someone has come to see Jason. Jason's mother, Beryl Grace, appears to him as a ghost.
Beryl attempts to convince that Jupiter made her leave Jason at the Wolf House and that she had no choice. Beryl unsuccessfully tries to get Jason to fight for Gaea, who let her out from the Underworld, and then disappears as a spirit of insanity or mania. Since the disguise around Jason is broken, all the monsters/ghosts attack. As the fight goes on, Jason is stabbed by Michael with an Imperial Gold gladius below his ribcage. Piper rushes over, defeats the ghost of Michael and tends to Jason's wounds. Annabeth runs to signal Leo Valdez on the Argo II and asks Frank Zhang to fly down and collect Jason. Suddenly, a crack appears in the stone and Juno appears to tell the heroes that they need to find goddess of victory in Olympia because she is out of control and then find the twins, Artemis and Apollo who are in hiding from Jupiter. As Juno disappears before her husband Jupiter finds her, Jason faints.
Meanwhile, Reyna Avila Ramírez-Arellano, Nico di Angelo, and Gleeson Hedge are falling from the sky with the Athena Parthenos above the volcano, Mount Vesuvius after shadow traveling. Nico is too exhausted to shadow travel again, so Reyna helps by lending him her strength, which is a power of children of Bellona. They shadow travel one more time to Pompeii, where they lay camp for the night since Nico is unable to travel anymore. Coach Hedge takes first watch as Nico and Reyna go to sleep.
Reyna dreams of a giant following them. Then her dreams take her to where Octavian is with the legion outside of Camp Half-Blood. Octavian personally takes on the highest tile, Pontifex Maximus, which no demigod has ever done. His fellow centurion, Mike Kahale, and the legion's eagle bearer Jacob are beside him, listening to Octavian reinstate Bryce Lawrence, a legacy of Orcus, who was banished from the camp for killing a centurion and other horrific crimes. Octavian has added two dozen different murders, thieves, and traitors into the legion since Reyna has been gone, which makes Mike upset. Mike disagrees with Octavian attacking Camp Half-Blood against Reyna's orders, but Octavian is convinced that once the Greeks are eliminated the war will be over and that he will be remembered as the savior of the Romans. Mike questions if Octavian's gift of prophecy has returned, to which Octavian defensively retaliates against.
Coach Hedge wakes up Reyna since tourists have come to visit the frozen citizens of Pompeii, but luckily the mist surrounding the Athena Parthenos is strong and wards off the tourists. By sunset, Nico wakes up and Reyna tells him about her dreams. Nico believes the dream is about a giant and to avoid it at all costs, but Coach and Reyna believe that fighting will be the best option. Nico considers asking the Hunters of Artemis', Thalia Grace, for advice, but is weary to do so. Reyna decides that she will contact the Amazons for help as well, but decides to work out the details until the next jump. Then Gaea's voice is spoken from Coach Hedge's body and multiple earthen ghosts attack.As they attack, Reyna tells Nico to get Diocletian's Scepter, so that she can command the dead legionnaires since she is a praetor. Reyna controls the dead legionnaires, but they are still out numbered. Nico, finally strapped in to carry Athena Parthenos shadow travels.
Back on the Argo II, Leo is working on a secret project until Piper tells him that there is a meeting in the mess hall. Leo joins the others, along with Buford, the table. The seven discuss going towards Olympia, meeting Nike, and which demigods should go and meet the goddess. They decide that Frank, Hazel, Percy Jackson, and Piper should go since they are the least competitive group that will not try to outdo each other.
The four leave to go scout the area. Percy and Leo search a museum, while Frank and Hazel are looking at ruins. While waiting for Frank and Hazel to return, Leo feels uncomfortable around Percy since he got back from Tartarus and due to Calypso's old feelings for Percy. Before they could discuss it, Frank and Hazel get back accompanied by Arion who had appeared out of nowhere. The group head towards the ruins which are roughly five kilometers wide. They decide to walk through the ruins looking for something to pop up. Eventually, they head toward the Temple of Zeus where an old Nike statue used to stand. Leo and Percy provoke the goddess to come forth by challenging that Adidas shoes are better than Nike shoes.
The goddesses Roman and Greek side, Nike and Victoria, are at war with each other trying to decide which side the victory. The goddess challenges the the four to a fight to the death, with the Romans and Greeks against each other. Nike demands for them to fight in an arena and gives them four minutes to be present. To make sure that they get there she sends four metal statues after them. Once there the group comes up with a plan to get out of killing each other. They decide on Hazel using her power with underground tunnels and Archimedes' spheres to help them win. After successfully tricking the goddess, they tie Nike up and she starts shouting about how they will never get the Physician's Cure after they question her about which one of the seven will die. Frank then puts a sock in her mouth and duct tape over her and they take her with them on the Argo II.
After shadow traveling, Nico is knocked unconscious and starts to dream of painful memories. As he's searching for Thalia's dreams, he ends up meeting Clovis, the head counselor of the Hypnos cabin, due to the Hypnos cabin's powerful dream activity. Nico tells Clovis to tell Chiron that they are bringing the Athena Parthenos and that he need helps tracking down Thalia. Clovis shows Nico the war meeting they had at the Big House. Clarisse La Rue is telling the campers about the defenses that they have and blames Rachel Elizabeth Dare of not being able to warn them of the giant army outside of Camp Half-Blood. Rachel defends herself by stating that Apollo's gift of prophecy is currently out of commission and Will Solace, counselor of the Apollo cabin, agrees. Ella has been too scared to mention anything about prophecies since the Romans surrounded. Clarisse demands that they attack the Roman base, which Jake Mason states is better defended than their own home. Connor Stoll convinces Clarisse to wait until Reyna delivers the Athena Parthenos like Annabeth stated. Then Nico is suddenly woken up by Coach Hedge.
After the shadow travel, the Athena Parthenos is laying sideways on the column of the Temple of Diana. Nico learns that he overshot and shadow traveled to Èvora, Portugal instead of Spain and that he's been unconscious for almost 36 hours. A spirit has been wandering around the trio and wants to talk to Nico. The spirit takes Nico to chapel, where Hades awaits. Hades tells Nico the hunter Gaea is employing is Orion. Orion already has the scent of the trio and will not stop hunting them until they are captured. Hades tells Nico that Hazel knows one of the Seven will die and that wolves are currently chasing after them as well. Nico quickly goes back to where the trio have set up camp and tells them about being chased by wolves. Then suddenly Reyna's dogs are startled because wolves surround them along with Lycaon. They engage in battle and eventually manage to shadow travel away, without a clear direction of where they are going.
Meanwhile, Frank and Piper are on port of Pylos looking for the poison and failing. They make their way down to Nestor's Cave after Piper charmspeaks a ghost into giving them direction. Frank goes in and talks to a man who hands him a bottle. Frank explains that his cousins, other descendants of Periclymenus, have been living there for generations. As a parting gift, the cousins gave Frank the small vile of poison. Frank has an idea of how to find a chained god in Sparta, but won't discuss it until the others are back on the Argo II. Once on the ship, Frank states that the the chained god is Ares because the Spartans believed that if they chained him up the spirt of war would never leave them. Piper unsheathes her dagger after telling them of seeing visions of Annabeth and her exploring ruins. Percy tells Leo that they should be airborne since a sea serpent is checking out the ship.
- Jason Grace
- Piper McLean
- Percy Jackson
- Annabeth Chase
- Frank Zhang
- Hazel Levesque
- Leo Valdez
- Reyna Avila Ramírez-Arellano
- Nico di Angelo
- Butch Walker
- Lou Ellen
- Will Solace
- Clarisse La Rue
- Connor Stoll
- Rachel Elizabeth Dare
- Grover Underwood
- Hunters of Artemis
- Thalia Grace
- Gleeson Hedge
- Chuck Hedge
- Hylla Ramírez-Arellano
- Bryce Lawrence
- Michael Kahale
- Argentum and Aurum
- Michael Varus
- Beryl Grace
- Julian Ramírez-Arellano
- Suitors of Penelope