In Chapter 15, the book goes into depth about quite a few psychological disorders. To start off the chapter they try to answer the question, "what is mental illness"? Then they touch on the topics of anxiety disorders, mood disorders and suicides, personality and dissociative disorders, schizophrenia, and childhood disorders.
In the chapter there is a section about diagnosing mental disorders. To do this there is a system called the Diagnostic and Statistical Manual of Mental Disorders. The system itself is pretty impressive and can do quite a few things to help make diagnoses.
The section that interested me the most was the section on anxiety. Most of my family and I have been diagnosed with some type of anxiety. Anxiety isn't just one diagnostic, there are different types of anxiety that people can have and it is interesting to read about the different kinds that there are.
This chapter is a very interesting one to read. There are so many different kinds of psychological disorders and the chapter does a very good job of discussing the differences between certain ones, and quite a few of their symptoms.