​Would you subscribe to a Victorian mystery that arrives as real letters through your door?

I’m a retired resident of the Isle of Wight and I’ve been quietly building something I’ve never seen done before.
Every month for 12 months you’d receive two handwritten style letters through your actual door, a Victorian mystery set here on the island where Queen Victoria spent her final years.
You’re not just reading the story.
You’re IN it.
The letters are personally addressed to you.
A dead man has left you something in his will. A locked box and someone connected to Osborne House doesn’t want you to open it.
Each letter comes with a small keepsake a clue, an artefact, something that grows in meaning as the story unfolds.
In month two you receive a brass key. In month twelve a small wooden box arrives that the key actually fits inside is the final reveal, printed on aged parchment.
£12 a month or a gift for someone who loves history and mystery.
I’m not launched yet, genuinely just want to know if this is something people would want.
Would you subscribe?