I purchased this book due to the overwhelmingly positive responses... While the actual concept and some of the underlying principles are pretty solid, there are a few things that detract from this book.
First of all, the font is about 14pt Times New Roman, which adds to the sense of this book being fluffed. Contributing to this feeling, is the fact that the author continually attempts to provide credibility to himself by mentioning O.C. Tanner, and the "various" projects he's worked on (for which he uses the same five examples ad nauseam). Essentially, he continues to justify why he's qualified to be telling you anything, while dropping the occasional "teaser" about the form you'll be using for the first FOUR CHAPTERS.
The absolutely most irritating aspect of this book, however, is that he's continually trying to sell it to you. In chapter one, he introduces an acronym for "The One Page Project Manager," viz. OPPM. He then proceeds to NEVER use it. Then, he mentions "The One Page Project Manager," so much that if I hear it again, I might end up incarcerated. On page 29, even with 14pt font, he manages to use "The One Page Project Manager" SEVEN times. I'm sure that my few mentions of that heinous term have already provoked certain ire. And by not using the acronym, he ensures that the term is too lengthy to conveniently skip while reading.
Chapter 5 comprises the bulk of the book (being some 100 pages in length - a shocking dichotomy from the previous 12-20 page chapters). Presumably where the "meat" is, it's filled with stuffing in the form of multiple OPPM's, with only the slightest difference between any of them.
To his credit, the concept is good, I think it will work (that's why I purchased the book). But Mr. Clark Campbell needs to realize that he doesn't have to sell his book during the first four chapters, as I already bought it.
2 stars for utility. -3 stars for absolute aggravation.