I agree, it's a good one :) I'm south of them, in a bit different microclimate, but it is pretty general for this whole area, no seriously specific plants.
Midwest
Permaculture Institute also put out a pdf titled "A
Permaculture Primer" and one called "Midwest
Permaculture's 80 favorite plants for Permaculture Guilds in the Midwest" I remember they came off their site, I have had them for a couple of years, so I don't recall exactly where on their site.
If I were doing a proper review of these I'd say :: I give these PDfs 9 out of 10 acorns, would definitely recommend them! :D