"I'd write a book, but would you pay to read it??????????????"

Absolutely, if there at least say 3? well known experienced proven porters contributing, anywhere from $100-250 a book. I also think different viewpoints are critical for the reader. Not sure if egos would allow a combined effort. That would be cheap info with the years of experience shared. Needs to be as textbook as possible, not a quick private library reading material read 3 pages at a time. However, I'm leery that the trial and error technique does not lend itself to printed page.