I have released a book on KDP:
Natural Workflow: Notes on David Allen's Methodology.
Below are three non-contiguous sections from Chapter 1.
The Kindle edition is available on Amazon.
Buy David Allen's classic book first.
Thanks for reading,
UPDATE 2016: After weathering some legal questions from the David Allen Company, all is well. Sales lately have been slow, but I know this book is essential reading for anyone desiring to take their GTD system to a higher level. I will begin posting on GTD forums without making any direct marketing pitches.
GTD® and Getting Things Done® are registered trademarks of the David Allen Company (http://www.davidco.com), which has not been involved in the production of this work.
This Kindle Edition of Natural Workflow: Notes on David Allen's Methodology offers you two things. Part I is an analysis of the larger background to GTD's foundations to help deepen your GTD® thinking. Part II is a clarification and slight refinement of the GTD® methodology to help super-charge your current GTD® system.