I got to the end of the first page of The Alchemist (by Paulo Coelho, trans. Alan Clarke) and saw a musical. The speaker in the novel expresses the theme: I never "wavered in my vision" and "in the end, I realized . . .". Imagine the musical of which that is the synopsis.
"Well, every musical every made," you might reply, dear Reader. Yes, so it's not the them, it's the details that have to sell the show.
In the case of The Alchemist--to be confirmed once I finish reading it--the details include a writer whose first book, published twenty-five years ago, "no one noticed." Other characters would be a bookseller, a publisher, and the single customer, who buys the book twice.
Somehow the book itself would be the focus of the opening song, a montage involving all who carry it.
As for love interest . . .