Before she ever wrote The Post Traumatic Stress Disorder Relationship, Diane England was writing about narcissism, addictions, and abuse at a website by that same name. She also discussed the topics of the codependent and codependency and how to heal--how to become dodependent no more--via personal development and spiritual growth.Thus, she wanted to provide you with links to these websites.
That said, Dr. England certainly doesn't want you to confuse the mental health disorder of Post Traumatic Stress Disorder or PTSD with that of narcissism. After all, it is possible that your partner suffering from PTSD could seem narcissistic. But indeed, they are different mental health issues--as she talks about in an article posted at this website that you may want to read if you haven't already. Anyway, since your partner could have developed PTSD symptoms after being the victim of an abusive narcissist, you may find articles at the website about narcissism, addictions, and abuse helpful. Then again, you may have your own concerns about being codependent or codependency and, as a result,want to visit that website. So, here are the links to the two websites.
Visit Narcissism Addictiions Abuse