I think this is an excellent book on helping couples navigate negative cycles and work through issues using an attachment theory lens.

I will say that focus is on fairly well established coupled or coupled with well established negative cycles.

So there are some activities to donin the book alone or with your partner but if you're in a newer relationship looking to pravtice how not to go into negative cycles this probably isn't really the book for you. 

While I did learn some things I found I couldn't do any of the activities.