The American Library Association (ALA) has a pathfinder for librarians and library science students interested in prison librarianship. It has a number of great resources for librarians such as books and articles. It also has more specialized materials about collection development, professional development, and collections for juvenile populations. This pathfinder is a great place to start doing research about the field of prison librarianship.
http://www.ala.org/offices/sites/ala.org.offices/files/content/olos/incarcerated.pathfin.pdf
prisonlibraryresources 