A great book with lots of voice options. Plus most high schoolers study this so you have a firm demand. You'll need to post this regularly to get traction but it will be evergreen once posted, so it'll forever stay relevent

Potentially lean into the somewhat recent film release with tags. You could also mention cast names like "I couldnt get Elordi but XXX is even better"

This is a strong evergreen idea, especially because Frankenstein has both student demand and general gothic/classics appeal. I’d make the positioning really clear though: is this an audiobook, a dramatised reading, or a cinematic adaptation for audio? A tagline could help with that — something like “Classic literature, brought back to life” works especially well for Frankenstein.

This works best if the title sells the listening experience, not just the book. "Frankenstein: Dramatised Version" is clear, but it feels a bit flat. I would push the angle that makes this different from a normal audiobook: character voices, sound effects, and a more cinematic listen. The main risk is production time. If this is chapter by chapter, I would make the first upload a strong proof of concept and see if people actually want the format before committing to the whole book.