Here's why:
* Poor Reception: The "Sea of Monsters" film was met with negative reviews from both fans and critics. It deviated significantly from the source material and many felt it didn't capture the spirit of the books.
* Box Office Disappointment: The film did not perform well at the box office, failing to generate the revenue needed to justify a continuation of the franchise.
* Disney's Focus on Other Properties: Disney, the studio behind the films, has chosen to focus on other properties and franchises instead of continuing with the "Percy Jackson" series.
However, there is good news for fans! There is now a Disney+ series based on the Percy Jackson books, which is currently being filmed. This adaptation is being overseen by Rick Riordan, the author of the books, and is expected to be much more faithful to the source material.