The book "Publicly Available Rocks and Minerals of Missouri" by Keller, V.D. is an indispensable reference for those interested in the geology and mineralogy of this region of the United States. It describes the most common rocks and minerals found in Missouri, with detailed characteristics and photographs. The book contains information about the origin of rocks and minerals, their properties, locations and useful tips on their identification. With this book, readers will have the opportunity to better understand the geological structure of Missouri and enrich their knowledge of the natural resources of this unique region.