This book explores John's love life through the len's of him taking notes and dictating his feelings and what he was going through and from what appears to be discussions to a degree with his wife about how she felt at the time in great detail.
It gives a lot of straight talk on the emotions required to deal with an open relationship and the emotional maturity that one has to go through in order to deal with it.
There are also talks on marriage and the rules they lay down to make each other comfortable. If you want to learn about an open relationship from an emotionally mature man's point of view. From the frustrations to the things that worked and the things that didn't and a bit about how they went about solving/dealing with each issue.