There are (as far as I understand) unauthorized summaries on Amazon. This one looks promising, but it's hard to assess the quality without actually reading it:

There are (as far as I understand) unauthorized summaries on Amazon. This one looks promising, but it's hard to assess the quality without actually reading it: http://www.amazon.com/Getting-Things-Done-Summary-Productivity/dp/1477490086 http://www.amazon.com/Getting-Things-Done-Summary-Productivi...