John,
Try going to a meeting of the Arizona Screenwriters Association. (www.arizonascreenwriters.com) You'll meet plenty of writers there. There might be one who wants to collaborate.
Congratulations, camopdp, on your work and success! Both films you've posted about look intriguing. I'll have to buy both of them before I ask any technical questions. Do you ever work on short films?
Gina,
I would suggest having your aunt look for a literary agent. (Hollywood Creative Directory) The literary agent would be responsible for selling the film rights to the book. Unless you're thinking of adapting it yourself or hiring a screenwriter... There's a good site on screenwriting...