How is Percy Jackson and the Olympians Season 2 different from the books?

Percy Jackson and the Olympians Season 2 is setting course for the Sea of Monsters, and just like in Season 1, there are bound to be a few adaptation changes ahead.

Whether it's adding new characters or tweaking major book events entirely, some of these changes from Rick Riordan's original books fall flat, while others enrich the world of the show. Here are all the biggest changes between Percy Jackson and the Olympians Season 2 and The Sea of Monsters. We'll be updating every week, so be sure to come back for more adaptation breakdowns.

Episode 1: Grover meets new characters, like Alison Simms.

Season 2 kicks off with Percy having a nightmare about Grover in danger, just like The Sea of Monsters does. However, there are some key differences: Grover isn't in Florida, meaning we don't get him running into St. Augustine Bridal Boutique. (Don't worry, though, the show doesn't abandon the wedding dress storyline.) Instead, he's in the jungle, where he meets a crew of demigods like Alison Simms (Beatrice Kitsos). They're new characters who have allied themselves with Luke (Charlie Bushnell) and Kronos, meaning Percy and his crew will have even more rogue demigods to contend with.

Episode 1: Basically everything about Tyson is different.

Percy Jackson and the Olympians Season 2 introduces Tyson (Daniel Diemer), Percy's Cyclops half-brother. In the books, he is unhoused, and while he attends Meriwether College Prep with Percy, no one gives him any extra support outside of school. That changes in the series, as Sally Jackson (Virginia Kull) meets him while volunteering at a shelter, takes him in, and gets him into Meriwether. That means she and Percy already know he's a Cyclops, as opposed to in the book, where the Mist disguises his true nature to Percy.

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I'm always happy to see Sally get to showcase her kindness and empathy, and I'm intrigued by whether she's aware of Tyson also being Poseidon's (Toby Stephens) son. Based on her telling Percy that they might have more in common than they think — hence the "two sides of the same coin" talk — it seems like she's got a pretty good idea, giving her more investment in Percy and Tyson's relationship.

Another big change with Tyson is how he speaks. In The Sea of Monsters, he has a more childlike speech pattern, as Cyclops age more slowly than humans. Here, though, he sounds like any of the other characters. Perhaps this was a case of the book dialogue simply not translating well to screen, for fear of infantilizing or stereotyping Tyson. Still, it seems like book Tyson's loyalty and enthusiasm carry over into show Tyson.

Episode 1: The Laistrygonian giant dodgeball scene gets a big change.

The Sea of Monsters opens with a monster attack in the form of a deadly gym class. Laistrygonian giants posing as visitors from Detroit sneak into Meriwether and wreak havoc during a dodgeball game, hurling fireballs at Percy, Tyson, and their classmates. Percy Jackson and the Olympians moves this fight scene from Meriwether to Camp Half-Blood, with the Laistrygonians ambushing Percy, Tyson, and Annabeth on their way to camp. In moving the scene, the attack winds up replacing the book's Colchis Bull fight.

While there's still a fiery dodgeball element to the Laistrygonian sequence, it misses a lot of the charm from the book's version. Gone are the Laistrygonians' weak disguises, along with the name tags reading Joe Bob, Skull Eater, and Marrow Sucker. These disguises, along with the high school setting of the scene, are a huge part of the appeal of Riordan's series in the first place: seeing Greek mythology transposed into our day-to-day world. I understand wanting to fold two monster attacks into one due to time and budget constraints, but there's still a lot lost when you rip away one of the defining elements of the book series.

Episode 1: Chiron is fired for different reasons.

Rounding out the biggest changes from episode 1 is Chiron's (Glynn Turman) firing from Camp Half-Blood. In the show, he's fired because he's the son of Kronos, which makes the Greek gods wary about his allegiances. The book takes it a step farther: In The Sea of Monsters, Chiron's connection to Kronos makes him a prime suspect in the poisoning of Thalia's (Tamara Smart) tree. He's already fired by the time Luke poisons the tree in the show, though. Percy sees Luke attack the tree in person, furthering the animosity between the two.

Episode 2: Whoa, there's a lot of drama between Percy and Annabeth.

Percabeth shippers, buckle up, because this episode delivers so much angst. Chiron reveals the Great Prophecy to Annabeth before telling her that she can't let Percy go on any quests. Cue Annabeth planning to sabotage Percy in the chariot race should it come down to the two of them. Later, she suggests she go on Clarisse's (Dior Goodjohn) quest for the Golden Fleece without Percy. All of this is new, and it's stressful, adding more distrust between the pair.

Despite all the new twists in how the quest comes together, the end result is the same: Percy, Annabeth, and Tyson set out for the Sea of Monsters. However, Percy and Annabeth are more at odds than ever before, setting a more adversarial tone for the quest ahead.

Percy Jackson and the Olympians Season 2 is now streaming on Disney+, with a new episode every week.