I bought this book to be prepared for whatever my ex husband had to throw at me, he is a narcissistic sociopath, I didn't get the full blown narcissistic rage but I was better prepared for the "dirty tricks" he was likely to use. As any narcissist or anyone else with a personality disorder of narcissism, borderline personality disorder, sociopath and other traits, this book is invaluable to help you know what you are dealing with, to be able to mentally protect yourself against ANY of the tactics they are likely to use against you. As they regard leaving as an act of betrayal, then you will be viewed as the enemy and that means any and all means at their disposal can and will be used against you. I bought several books while going through the divorce process, which took 2 years and we were still sharing a house together, I wouldn't recommend that but it can be done, I needed every piece of information I could get my hands on, Splitting has been well read, passages underlined, comments in the margins, little post it notes in the tops of pages. Even now we are parted completely, I still read now and again to reinforce to myself why I had to get out, just in case I might forget. If you are in an abusive relationship and it will be abusive if you are living with someone who has a personality disorder then you need to gather as much information as possible firstly to protect yourself and secondly to get ammunition for yourself as they will not go quietly and will do their level best to grind you down till you give up. This book was invaluable to me.