Based on memory of what is in the CG, here is a Twin Cities list:
Old:
Oak Ridge CC
Town & Country
New:
Spring Hill (a polarizing Fazio)
Windsong Farm
Stoneridge
I will take a look at the book and edit at some point.
Tom,
I, like Jason, don't have my Confidential Guide handy right now but I would also like to see an expansion of the book's Minnesota listings. I'm not sure
Interlachen CC has been changed enough (outside of some tree removal, bunker renovation, and a few tees) to warrant a new trip...but I think
Minikahda has in the huge amount of work done. Jason's list above is certainly a good start...
Oak Ridge has a very very good stretch of holes from #11-#17...
Town & Country Club (my home course) is super quirky, old (1888), unique, fun but almost completely under the radar... In addition to Jason's list, I would of been really interested to hear what you thought of
Keller GC in St. Paul mostly because it was a pretty neat golf course with features not seen on Public golf courses anymore but Richard Mandell is renovating the course right now. I also think
Minneapolis Golf Club (Park/Ross/Prichard) would be worth checking out as would
North Oaks (Stanly Thomson/Tom Leahman) and
Edina CC (in the original, but it's been extensively redone by Leahman).
Generally speaking, I think the Twin Cities area would be worth a visit for your updated Guide. There is a bunch of stuff in Chicago that's been redone over the years since you visited but probably isn't worth your time to see. However, one neat course you should make an effort to do see when in town working at Medinah next year is
Glen View Club in Golf, IL...it's not a "9" but it has some great holes. I can't remember if you listed
Old Elm but if you haven't that's another one you should make a serious effort to see. As much of a fan I am of Shepherd's Crook (Jud's recommendation) I would never tell you to take a few hours to see it if you haven't seen Glen View or Old Elm first. I still think of the Confidential Guide as a
Guide to someone unfamiliar with an area...so I would rather you include the most worthy courses first...a Spring Valley or Shepherd's Crook would be something of a "deep cut" to me.