Some years ago I wrote an article about securing book donations for our 55 prison libraries in Michigan, then published it in the library magazine, Against the Grain. Recently I have found the article is in an archive from which one can download the full article PDF.
For some churches just getting started with a library, and those needing to expand, the ideas here could be useful. I won't re-enter the article here, but give you the link. http://docs.lib.purdue.edu/atg/vol4/iss4/51/