THANK YOU, THANK YOU, THANK YOU for this book! I own five mushroom foraging books and "Mushrooms of the Upper Midwest" is easily the smallest book while being the one that helps me most in the field. This means it ALWAYS travels in my daypack. If you're like me and you're obsessed with mycology then you may prefer Michael Kuo's book "Mushrooms of the Midwest" since it leaves out confusing common names and gets straight down to scientific business. On the other hand, if you are new to mushroom hunting and just want to start eating those yummy fungi then this is the book you want!
A few guides that I have used for South Dakota & Minnesota: "Mushrooms Demystified" David Arora, "Mushrooms" Simon & Schuster, "Mushrooms of the Midwest" by Michael Kuo, and this one.