Arguably, the right answer now is to document everything that matters to you about the adventure, and tell an LLM to run it.
It would write the book ahead of you, kind of like how railroads could send trains with supplies out to the track as it was built.
It also allows you to deviate from the novel. This is a romance novel. I had the main character choose someone else and it showed an alternate version of the novel. After the main threat of the story was dispatched things settled into weeks of routine living where I added another person into my routine. I played to see if another event would show up but after 3 in game weeks I decided to stop. This was a test and I needed to improve the game. I can see this becoming addictive to some people because they will be living in the story and having a life there and making friends and finding partners.
This type of game is still uncharted territory. Does one end the game or let the player play indefinitely? Is it more fun to have the player do the daily life things or skip those or give them a choice?