"The ArcGIS Book - 10 Big Ideas about Applying The Science of Where" is a useful resource from Esri showing some of the key trends in GIS and mapping. For example it can be handy to share with colleagues and management to help them understand what you do. It is available free online: http://learn.arcgis.com/en/arcgis-book/ and can also be purchased in print form.
> Chapter 3 - Tell Your Story Using A Map is all about Story Maps. Well worth a look.