\u003cp\u003e\u003cb\u003ePrimary market:\u003c/b\u003e For those who suffer from depression or those with a loved one with depression who wish to understand more about the mental disorder. \u003cb\u003eSecondary market:\u003c/b\u003e Students and professionals in the medical or psychological fields would also benefit from this book.\u003c/p\u003e