Artist's book published in conjunction with installation of Mark Dion's "Urban Wildlife Observation Unit" in Madison Square Park, NY, July 11 - October 31, 2002. Texts by Michael Crewdson, Margaret Mittelbach, David Rivel, Jessica Lin Cox, Gregory Volk. Drawings by Ignacio Lang, Jorge Colombo. Photographs by Bob Braine. Includes schedule for lunchtime talks, bibliography.