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Percy Jackson season 2's finale made a lot of changes to the book (but it still had the best nod)

Although the finale of Percy Jackson season 2 made more than a few changes to Sea of Monsters' ending, there was still a really great book nod.
FandomWire

How Percy’s Relationship With Poseidon Gets a Major Moment in Season 2

Percy Jackson and the Olympians Season 2 expands Poseidon and Percy's father-son bond and teases Season 3 evolution.