With a wealth of information on ecology, geology, state history, and useful hiking tips for beginners and experts alike, this is the only reference you'll need.
John Pukite is the author of A Field Guide to Cows and Hiking Minnesota, for which he won a Minnesota Book Award. He has served in the Peace Corps and worked in Alaska as a marine biologist.
Found the 1998 edition at a used bookstore for a good price. Comparing it some of the newer guidebooks I have, doesn't look like much as changed. There are a few trails listed in this book that I didn't find in the others, and I like how this one goes into a little more detail about the geology, flora, fauna of an area.