I believe most books that will do well as movies will or must have been bestsellers and if you have a book of this nature ,why not, one can go ahead and make a movie of it and eager fans will be ready to see it. The first thing to do will be to turn the book into a script,most film makers Will like to read a script and not necessarily a book It might not be easy to get your book turned into a script noticed, you might use some agency to help push your script to where producers and film maker will see your script. You might not have the money for production, so try going into contract with film markers and discuss on the financial aspect of screen playing the script.