Craig Carpenter is a senior product engineering writer on the Esri Press Books team and helps to develop and improve ways of learning GIS. Jian Lange is a principal product manager at Esri. She is responsible for various aspects of ArcGIS spatial analysis products, including business planning, road maps, requirements, and management. Bern Szukalski is a corporate technology evangelist and advocate at Esri, focusing on ways to broaden access to geographic information and helping users succeed with the ArcGIS Platform.