If you obtain a copy of the text, reading it straight through from cover to cover can be overwhelming. Use this structured approach to understand the material:
At impact, the left wrist (for a right-handed player) must be flat to ensure the clubface is square and under control.
I'm assuming you're referring to the "Golfing Machine" by Homer Kelley, a renowned golf instructor and inventor. Here's some information about the golfing machine and a possible PDF work link:
Do not waste your golf season hunting ghosts through broken forums from 2012. Spend the price of a round of muni golf. Buy the official eBook. Open your phone or laptop. And start building your machine.
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Kelley broke the swing down using engineering terms. He focused on the "Plane Line," the "Hinge Actions," and "Accumulators" (the body's power sources). By treating the arms and club as a system of levers, the book explains exactly how force is generated and sustained. 3. Power Packages
Relies on centrifugal force and a release driven by rotation and arm speed.
The book does not teach a single "correct" swing style. Instead, it provides a catalog of components. Golfers can mix and match these components to build their own efficient swing. Core Concepts of the System