I have just finished reading the book. It really is an attractive book, with the many colorful photos. I think when the authors were writing about the streams with which they were familiar, they presented accurate, useful information.
However, I am aware of several streams in the book that the authors had to rely on other people to get their information, and in at least several cases this information was inaccurate. One stream was said to have a terrific grannom hatch: This stream has not had a fishable grannom hatch for five years now. It was also noted to have a wonderful hatch of sulphurs, which have declined by 99 to 99.9% recently. (That may not be the fault of the authors, since the book may have been printed before we knew the sulphurs were gone.) Another stream that was listed as having terrific sulphur hatches has not had them for three years now b/c of a manure spill. And, a few pretty decent streams were left out (thank goodness!).
(Of note, several people who post on this forum were mentioned in the book, and they were NOT the ones who presented the inaccurate information.)
If other streams list inaccurate information, then the book might appear to be carelessly gathered.
Having said these things, most of the book is written well and reads easily for a guidebook, and, as I noted, it is really attractive.
I would rate it behind Mike Sajna's now outdated guidebook, on a par with Dwight Landis's book, and would rank it higher than Meck's and Wolf's books.
I think I would rate it with a 3.5 or 4.0 out of 5 because of the inaccuracies I found.
My wife, as usual, found it discounted significantly. If you can get it for 15 or 16 dollars, it is worth the price, IMO.