Apologies if this has been resolved elsewhere, but I have been unable to find an answer. I recently purchased the book Understanding GIS, 3rd Edition (ISBN: 9781589484832) to brush up on my GIS skills. The book includes a link (esri.com/understanding-gis-3) to download the files required for the project, but that link appears to no longer be valid. Are these files still available for download, and if so how can I access them?