You can get more info from the site of the author:
http://www.maxcontraction.com/Basically, it involves holding the weight for a few seconds, not even, when the muscle is fully contracted. You need partners to hold the weights while you position yourself into the full contraction point, then you take the weight from them and hold for as long as possible, which should only be a second or two. Bear in mind that the weight will be much heavier than what you would normally lift with regular techniques. This provides a powerful contraction, equating to the equivalent of what you would experience doing several sets, but is far more efficient.
The other important part of the technique is the rest period. The author stresses that you need a far longer time period than traditionally believed in order for the muscle to fully recover and build. He was talking about an average of 6 days, sometimes more. This was all proven with muscle mass measurements and weights, etc. Read the book as it explains it clearly.
