Thanks to BFields for the heads up!
Some sites to get the Annie On My Mind audio book
Audible - rather expensive, but you might be able to get it for free by using the promo codes some podcasts give (for example, Galactica Watercooler or Mugglecast ) They give one credit (which normally equals one book), but require you to enter your credit card information. You can cancel right away, so that's nice, and an option for some. I'm not sure if it will work with Annie, because I don't know how many credits the books is worth.
Otherwise Books On Board is selling it for a little under $15
Hope that helps! Go get it! :)