James, this is a wonderful and honorable project.
I think you'd have more success with a pricing model in the, say, $3 - $5 range instead of $8. Maybe it's better to start out a little lower than where you really want to be, just to get some copies out there, get some reviews, get some word of mouth. Then you can up the price later when you've got 1000s of people hooked!
But maybe that's just me. Anyway, best of luck with your project!