There are several books a public art program should have in its library. Keep in mind that a public art program should offer resources that will inform and enlighten all constituents: artists, community leaders, elected officials, and the general public. Here are some suggestions for places to start.
At the top of the list is Going Public: A Field Guide to Developments in Art in Public Places by Jeffrey L. Cruikshank and Pam Korza (published by the Arts Extension Service, Division of Continuing Education, University of Massachusetts, Amherst, MA 01003; telephone 413-545-2360). Though published in 1988 (and unfortunately not updated since) this is a good textbook for general reference. You will note that many topics covered in this handbook are also addressed in Going Public. There is also a good reference section of resources in the Appendix, including the New York City Bar Model Agreement (with annotations) for commissioning a work of public art, and names and addresses of programs throughout the country (it obviously is out of date, but should be a good point of departure). This may be the best general, overall reference available, even though it is fifteen years old.
Two helpful reference guides worth tracking down:
Two books that collect essays on public art issues may be worth your attention:
Essays in both the above books are short and provocative. They discuss different projects, directions, and influences, sometimes in a case study format; from different American communities. The essays make good context reading for the public art administrator.
Other books worth looking at are: