I remember being told, as a child, "OH, don't be Super Sensitive!" This accusation was given in a tone of annoyance. For a long time I thought I was like everyone else, but then someone told me about this book and recommended it to me.
I have an exaggerated startle response. If I hear a sharp, loud, sudden sound, I nearly jump out of my skin, literally jumping and crying out. I feel foolish when it happens, but I cannot control it. Even the toaster does it to me, so I have to go some distance from it when the toast is about to be done.
When I read this book, I recognized myself and my responses to things. There is a test in the beginning to help a person determine if they are in the category of Highly Sensitive. I am, and it has helped me to know that I am part of a minority of human beings. I protect myself from being overstimulated (read, "I do not go to malls if I can help it"), for example.
I recommend this book for anyone who is very sensitive or who has a family member who is sensitive. It helps us all understand the type.