This book is dangerous.
I have to say that I have no personal experience with Biblical Counseling and I cannot say how representative this book is for the movement as a whole. However, I can only recommend to run as fast as possible if a counselor bases their advice on this book.
Biblical Counseling is based on the assumption that all mental health issues, addictions and other things you would seek counseling for can be solved by looking into the Bible. It rejects modern psychotherapy and is also very sceptical of medications such as antidepressants. While it never outright says to not take them, this book contains several "success stories" of people who rejected medication. No one in this book says they benefited from it.
Issues mentioned in this book are PTSD, depression, eating disorders, transgender, a cheating husband, grief, rape and more. In the first part of each chapter, they describe the issue and sometimes also use scientific sources and most of it is decent. But the solution in all cases is that the cause of the issues, even if it was something that was done to you, is a sinful attitude. It's cruel, there is not a lot of empathy and it also misses the mark in these cases where the person has no responsibility in how their issues came along. Usually, the conclusion is that they all don't trust God enough and have made an idol out of their health problems.
The woman whose husband is an unrepentant adulterer is told to have nice meals ready for him when he comes home. The parents with the transgender child are told to isolate them from all of their friends. Anxiety and panic attacks only mean you don't trust God enough and that you are idolizing your emotions.
They also explain that "secular" brain science and psychology does not apply to Christians (I guess it only applies when it helps further their arguments, as they use it from time to time to prove their points) and that for example, grief works different in Christians and they do not go through different stages, as do "unbelieving" people.
This book is pure victim-blaming. It might cause struggling people to further withdraw and some of the suggestions are known to be not only helpful, but also actively harmful.
There are therapists out there that respect your beliefs and at the same time use scientifically proven methods. That use medications but still help you treat the root. That will do more than give you a list of Bible verses to meditate on. It's worth looking for them.