The book being referred to is "The pH Miracle: Balance Your Diet, Reclaim Your Health" by Robert O. Young and Shelley Redford Young (it's sitting in my shelf).
Naturalistic type guys like Tony Robbins are big-time into this type of stuff, and there's no doubt that Tony has mega-energy.
However, there is a lot of conflicting scientific data on this stuff. These guys basically promote a strict vegetarianism, and say that you can build muscle off of the protein that you get in vegetables because the real source of muscle is "oxygene."
It's a bit odd to me how we as bodybuilders have partially taken to the idea of taking green-drink and more vegetables to "stay alkaline", when the book that the ideas come from basically says that the traditional high-protein bodybuilding diet is so utterly detrimental. Still, there's no harm in hedging your bets with some extra greens.
Personally I think a diet of lean-cuts and a lot of vegetables is the way to go. We've evoled as omnivores and when there's clearly so much lost by cutting out meat (though they say otherwise) it just doesn't make sense to me to go vegetarian.
The big thing I took from the book was to take green-drink (I mix it with my protein), to eat more vegetables, and to drink more water.