Don't be dissuaded because the title implies that this book is geared toward life after leaving someone. In some ways I feel like it's especially helpful in the case of a person who is trying to choose between staying and leaving. I love the list-making and written self-exploration sections. Their detailed specificity makes it impossible for the survivor of abuse to let their brain sort of "look away" or to follow its usual, well-grooved paths.
The goal here is to guide survivors toward reclaiming themselves--to recognize your value and regain your self-worth and self-esteem--to be strong and independent (and maybe creative and fulfilled again), either while being in a challenging relationship, or after having left.