These modules are designed with step-by-step directions to let even novice users utilize the power of the ArcView® GIS application to explore, manipulate, and analyze large data sets. Each new copy contains a CD with unlimited access to the SAGUARO projects and data as well as a 120-day time-locked dual-platform version of the ArcView® software. (Site license users of ArcGIS software can order the guides without the CD.) The manuals can be purchased alone, bundled together, and/or bundled with The Changing Earth.