Examining the list of transgressions convinces me the book is a crock o'shit--some of those I wouldn't qualify as transgressions of any sort. I'd say the only valid argument the author (and the reviewer) could offer to support those as transgressions would be of the social expectations sort mentioned--and that only for specific groups that have those expectations. And some of us don't have any such silly expectations.
When speaking of various forms of non-monogamy...it ain't poly if you're just fucking around.
While polyamory, open relationships, and swinging are all distinctly different approaches to non-monogamy, they are not mutually exlusive. Folks can, and some do, engage in more than one of them at a time--and it's all good.