This handy FoldingGuide(TM) includes 58 mushroom species, both common and rare. They include gilled mushrooms, boletes, polypores, and more. The guide also includes tips for identification and specifics on poisonous species. The Midwest region includes the following states: Ohio, Michigan, Indiana, Illinois, Wisconsin, Minnesota, North Dakota, South Dakota, Iowa, and Missouri. The illustrations and text are by Kirsten McKnight Ward, Joseph R. Rohrer, and Karl B. McKnight, co-authors of the Peterson Guide to Mushrooms, Revised Edition, published by Houghton Mifflin Harcourt.