the author is a life coach (there are no qualification requirements; anyone can be one), and the writing is very vague; so much so, that it could be applied to anyone or anything.
better understanding your attachment style and your wifes, and how the two of them interact is a great idea; same with better understanding codependency (aka "love addiction). im not sure how much this resource can help.
this is a great place to start:
https://bpdfamily.com/message_board/index.php?topic=279028.0its an outline on and intro attachment styles, based on the popular book "Attached" (recommended).
this is a great intro to what codependency is all about:
https://bpdfamily.com/content/codependency-codependent-relationshipsdoes it help? where do you see the two of you?