As someone who has a black dog of his own I sometimes find it difficult to describe my emotions and how black the mood can actually get. My wife found this book extremely useful in helping her to understand just how debilitating depression is. Instead of her watching me suffer this book has empowered her to take a more pro-active role in my recovery whilst still looking after herself. This book emphasizes the need for the carer to also take care of themselves. I think this book is written coherently and inspires hope and shows us how relationships can strengthen and not crumble because of this condition. So if the black dog is in your house maybe this book can help with the communication side of things, it certainly helped me. Take care...