on the subject. Although the book does discuss what emotions are, its quite light on theology of emotions per se. For example, the authors do not sufficiently wrestle with the falleness of the human condition. Instead of discussion emotions in terms of sinfful and non-signiful emotions, they opt for positive and negative. This is because fundamentally they see emotions as not sinful in of themselves. The problem is that the Bible does speak of "evil desire".
The whole questions of what emotions really are is not discussed in depth, which is surprising. I have read books which are not about emotions give an indepth treatment to this question. The weak theological foundation aside, I think the book is immensely helpful to every Christian in terms of how to engage with emotions. I particularly found section 3 on enganging the hardest emotions helpful. It is definitely a book worth having in your collection.