Apt Pupil

A golden California schoolboy and an old man whose hideous past he uncovers enter into a fateful and chilling mutual parasitism.

([source][1])

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Also appears in:

- [Different Seasons][2]

- [Apt Pupil / Rita Hayworth and Shawshank Redemption][3]

[1]: https://www.stephenking.com/library/novella/apt_pupil.html

[2]: https://openlibrary.org/works/OL81621W/Different_Seasons

[3]: https://openlibrary.org/works/OL14917077W/Rita_Hayworth_and_Shawshank_Redemption_Apt_Pupil